1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Driver for Marvell PPv2 network controller for Armada 375 SoC. 4 * 5 * Copyright (C) 2014 Marvell 6 * 7 * Marcin Wojtas <mw@semihalf.com> 8 */ 9 10 #include <linux/acpi.h> 11 #include <linux/kernel.h> 12 #include <linux/netdevice.h> 13 #include <linux/etherdevice.h> 14 #include <linux/platform_device.h> 15 #include <linux/skbuff.h> 16 #include <linux/inetdevice.h> 17 #include <linux/mbus.h> 18 #include <linux/module.h> 19 #include <linux/mfd/syscon.h> 20 #include <linux/interrupt.h> 21 #include <linux/cpumask.h> 22 #include <linux/of.h> 23 #include <linux/of_irq.h> 24 #include <linux/of_mdio.h> 25 #include <linux/of_net.h> 26 #include <linux/of_address.h> 27 #include <linux/of_device.h> 28 #include <linux/phy.h> 29 #include <linux/phylink.h> 30 #include <linux/phy/phy.h> 31 #include <linux/clk.h> 32 #include <linux/hrtimer.h> 33 #include <linux/ktime.h> 34 #include <linux/regmap.h> 35 #include <uapi/linux/ppp_defs.h> 36 #include <net/ip.h> 37 #include <net/ipv6.h> 38 #include <net/tso.h> 39 #include <linux/bpf_trace.h> 40 41 #include "mvpp2.h" 42 #include "mvpp2_prs.h" 43 #include "mvpp2_cls.h" 44 45 enum mvpp2_bm_pool_log_num { 46 MVPP2_BM_SHORT, 47 MVPP2_BM_LONG, 48 MVPP2_BM_JUMBO, 49 MVPP2_BM_POOLS_NUM 50 }; 51 52 static struct { 53 int pkt_size; 54 int buf_num; 55 } mvpp2_pools[MVPP2_BM_POOLS_NUM]; 56 57 /* The prototype is added here to be used in start_dev when using ACPI. This 58 * will be removed once phylink is used for all modes (dt+ACPI). 59 */ 60 static void mvpp2_mac_config(struct phylink_config *config, unsigned int mode, 61 const struct phylink_link_state *state); 62 static void mvpp2_mac_link_up(struct phylink_config *config, 63 struct phy_device *phy, 64 unsigned int mode, phy_interface_t interface, 65 int speed, int duplex, 66 bool tx_pause, bool rx_pause); 67 68 /* Queue modes */ 69 #define MVPP2_QDIST_SINGLE_MODE 0 70 #define MVPP2_QDIST_MULTI_MODE 1 71 72 static int queue_mode = MVPP2_QDIST_MULTI_MODE; 73 74 module_param(queue_mode, int, 0444); 75 MODULE_PARM_DESC(queue_mode, "Set queue_mode (single=0, multi=1)"); 76 77 /* Utility/helper methods */ 78 79 void mvpp2_write(struct mvpp2 *priv, u32 offset, u32 data) 80 { 81 writel(data, priv->swth_base[0] + offset); 82 } 83 84 u32 mvpp2_read(struct mvpp2 *priv, u32 offset) 85 { 86 return readl(priv->swth_base[0] + offset); 87 } 88 89 static u32 mvpp2_read_relaxed(struct mvpp2 *priv, u32 offset) 90 { 91 return readl_relaxed(priv->swth_base[0] + offset); 92 } 93 94 static inline u32 mvpp2_cpu_to_thread(struct mvpp2 *priv, int cpu) 95 { 96 return cpu % priv->nthreads; 97 } 98 99 static struct page_pool * 100 mvpp2_create_page_pool(struct device *dev, int num, int len, 101 enum dma_data_direction dma_dir) 102 { 103 struct page_pool_params pp_params = { 104 /* internal DMA mapping in page_pool */ 105 .flags = PP_FLAG_DMA_MAP | PP_FLAG_DMA_SYNC_DEV, 106 .pool_size = num, 107 .nid = NUMA_NO_NODE, 108 .dev = dev, 109 .dma_dir = dma_dir, 110 .offset = MVPP2_SKB_HEADROOM, 111 .max_len = len, 112 }; 113 114 return page_pool_create(&pp_params); 115 } 116 117 /* These accessors should be used to access: 118 * 119 * - per-thread registers, where each thread has its own copy of the 120 * register. 121 * 122 * MVPP2_BM_VIRT_ALLOC_REG 123 * MVPP2_BM_ADDR_HIGH_ALLOC 124 * MVPP22_BM_ADDR_HIGH_RLS_REG 125 * MVPP2_BM_VIRT_RLS_REG 126 * MVPP2_ISR_RX_TX_CAUSE_REG 127 * MVPP2_ISR_RX_TX_MASK_REG 128 * MVPP2_TXQ_NUM_REG 129 * MVPP2_AGGR_TXQ_UPDATE_REG 130 * MVPP2_TXQ_RSVD_REQ_REG 131 * MVPP2_TXQ_RSVD_RSLT_REG 132 * MVPP2_TXQ_SENT_REG 133 * MVPP2_RXQ_NUM_REG 134 * 135 * - global registers that must be accessed through a specific thread 136 * window, because they are related to an access to a per-thread 137 * register 138 * 139 * MVPP2_BM_PHY_ALLOC_REG (related to MVPP2_BM_VIRT_ALLOC_REG) 140 * MVPP2_BM_PHY_RLS_REG (related to MVPP2_BM_VIRT_RLS_REG) 141 * MVPP2_RXQ_THRESH_REG (related to MVPP2_RXQ_NUM_REG) 142 * MVPP2_RXQ_DESC_ADDR_REG (related to MVPP2_RXQ_NUM_REG) 143 * MVPP2_RXQ_DESC_SIZE_REG (related to MVPP2_RXQ_NUM_REG) 144 * MVPP2_RXQ_INDEX_REG (related to MVPP2_RXQ_NUM_REG) 145 * MVPP2_TXQ_PENDING_REG (related to MVPP2_TXQ_NUM_REG) 146 * MVPP2_TXQ_DESC_ADDR_REG (related to MVPP2_TXQ_NUM_REG) 147 * MVPP2_TXQ_DESC_SIZE_REG (related to MVPP2_TXQ_NUM_REG) 148 * MVPP2_TXQ_INDEX_REG (related to MVPP2_TXQ_NUM_REG) 149 * MVPP2_TXQ_PENDING_REG (related to MVPP2_TXQ_NUM_REG) 150 * MVPP2_TXQ_PREF_BUF_REG (related to MVPP2_TXQ_NUM_REG) 151 * MVPP2_TXQ_PREF_BUF_REG (related to MVPP2_TXQ_NUM_REG) 152 */ 153 static void mvpp2_thread_write(struct mvpp2 *priv, unsigned int thread, 154 u32 offset, u32 data) 155 { 156 writel(data, priv->swth_base[thread] + offset); 157 } 158 159 static u32 mvpp2_thread_read(struct mvpp2 *priv, unsigned int thread, 160 u32 offset) 161 { 162 return readl(priv->swth_base[thread] + offset); 163 } 164 165 static void mvpp2_thread_write_relaxed(struct mvpp2 *priv, unsigned int thread, 166 u32 offset, u32 data) 167 { 168 writel_relaxed(data, priv->swth_base[thread] + offset); 169 } 170 171 static u32 mvpp2_thread_read_relaxed(struct mvpp2 *priv, unsigned int thread, 172 u32 offset) 173 { 174 return readl_relaxed(priv->swth_base[thread] + offset); 175 } 176 177 static dma_addr_t mvpp2_txdesc_dma_addr_get(struct mvpp2_port *port, 178 struct mvpp2_tx_desc *tx_desc) 179 { 180 if (port->priv->hw_version == MVPP21) 181 return le32_to_cpu(tx_desc->pp21.buf_dma_addr); 182 else 183 return le64_to_cpu(tx_desc->pp22.buf_dma_addr_ptp) & 184 MVPP2_DESC_DMA_MASK; 185 } 186 187 static void mvpp2_txdesc_dma_addr_set(struct mvpp2_port *port, 188 struct mvpp2_tx_desc *tx_desc, 189 dma_addr_t dma_addr) 190 { 191 dma_addr_t addr, offset; 192 193 addr = dma_addr & ~MVPP2_TX_DESC_ALIGN; 194 offset = dma_addr & MVPP2_TX_DESC_ALIGN; 195 196 if (port->priv->hw_version == MVPP21) { 197 tx_desc->pp21.buf_dma_addr = cpu_to_le32(addr); 198 tx_desc->pp21.packet_offset = offset; 199 } else { 200 __le64 val = cpu_to_le64(addr); 201 202 tx_desc->pp22.buf_dma_addr_ptp &= ~cpu_to_le64(MVPP2_DESC_DMA_MASK); 203 tx_desc->pp22.buf_dma_addr_ptp |= val; 204 tx_desc->pp22.packet_offset = offset; 205 } 206 } 207 208 static size_t mvpp2_txdesc_size_get(struct mvpp2_port *port, 209 struct mvpp2_tx_desc *tx_desc) 210 { 211 if (port->priv->hw_version == MVPP21) 212 return le16_to_cpu(tx_desc->pp21.data_size); 213 else 214 return le16_to_cpu(tx_desc->pp22.data_size); 215 } 216 217 static void mvpp2_txdesc_size_set(struct mvpp2_port *port, 218 struct mvpp2_tx_desc *tx_desc, 219 size_t size) 220 { 221 if (port->priv->hw_version == MVPP21) 222 tx_desc->pp21.data_size = cpu_to_le16(size); 223 else 224 tx_desc->pp22.data_size = cpu_to_le16(size); 225 } 226 227 static void mvpp2_txdesc_txq_set(struct mvpp2_port *port, 228 struct mvpp2_tx_desc *tx_desc, 229 unsigned int txq) 230 { 231 if (port->priv->hw_version == MVPP21) 232 tx_desc->pp21.phys_txq = txq; 233 else 234 tx_desc->pp22.phys_txq = txq; 235 } 236 237 static void mvpp2_txdesc_cmd_set(struct mvpp2_port *port, 238 struct mvpp2_tx_desc *tx_desc, 239 unsigned int command) 240 { 241 if (port->priv->hw_version == MVPP21) 242 tx_desc->pp21.command = cpu_to_le32(command); 243 else 244 tx_desc->pp22.command = cpu_to_le32(command); 245 } 246 247 static unsigned int mvpp2_txdesc_offset_get(struct mvpp2_port *port, 248 struct mvpp2_tx_desc *tx_desc) 249 { 250 if (port->priv->hw_version == MVPP21) 251 return tx_desc->pp21.packet_offset; 252 else 253 return tx_desc->pp22.packet_offset; 254 } 255 256 static dma_addr_t mvpp2_rxdesc_dma_addr_get(struct mvpp2_port *port, 257 struct mvpp2_rx_desc *rx_desc) 258 { 259 if (port->priv->hw_version == MVPP21) 260 return le32_to_cpu(rx_desc->pp21.buf_dma_addr); 261 else 262 return le64_to_cpu(rx_desc->pp22.buf_dma_addr_key_hash) & 263 MVPP2_DESC_DMA_MASK; 264 } 265 266 static unsigned long mvpp2_rxdesc_cookie_get(struct mvpp2_port *port, 267 struct mvpp2_rx_desc *rx_desc) 268 { 269 if (port->priv->hw_version == MVPP21) 270 return le32_to_cpu(rx_desc->pp21.buf_cookie); 271 else 272 return le64_to_cpu(rx_desc->pp22.buf_cookie_misc) & 273 MVPP2_DESC_DMA_MASK; 274 } 275 276 static size_t mvpp2_rxdesc_size_get(struct mvpp2_port *port, 277 struct mvpp2_rx_desc *rx_desc) 278 { 279 if (port->priv->hw_version == MVPP21) 280 return le16_to_cpu(rx_desc->pp21.data_size); 281 else 282 return le16_to_cpu(rx_desc->pp22.data_size); 283 } 284 285 static u32 mvpp2_rxdesc_status_get(struct mvpp2_port *port, 286 struct mvpp2_rx_desc *rx_desc) 287 { 288 if (port->priv->hw_version == MVPP21) 289 return le32_to_cpu(rx_desc->pp21.status); 290 else 291 return le32_to_cpu(rx_desc->pp22.status); 292 } 293 294 static void mvpp2_txq_inc_get(struct mvpp2_txq_pcpu *txq_pcpu) 295 { 296 txq_pcpu->txq_get_index++; 297 if (txq_pcpu->txq_get_index == txq_pcpu->size) 298 txq_pcpu->txq_get_index = 0; 299 } 300 301 static void mvpp2_txq_inc_put(struct mvpp2_port *port, 302 struct mvpp2_txq_pcpu *txq_pcpu, 303 void *data, 304 struct mvpp2_tx_desc *tx_desc, 305 enum mvpp2_tx_buf_type buf_type) 306 { 307 struct mvpp2_txq_pcpu_buf *tx_buf = 308 txq_pcpu->buffs + txq_pcpu->txq_put_index; 309 tx_buf->type = buf_type; 310 if (buf_type == MVPP2_TYPE_SKB) 311 tx_buf->skb = data; 312 else 313 tx_buf->xdpf = data; 314 tx_buf->size = mvpp2_txdesc_size_get(port, tx_desc); 315 tx_buf->dma = mvpp2_txdesc_dma_addr_get(port, tx_desc) + 316 mvpp2_txdesc_offset_get(port, tx_desc); 317 txq_pcpu->txq_put_index++; 318 if (txq_pcpu->txq_put_index == txq_pcpu->size) 319 txq_pcpu->txq_put_index = 0; 320 } 321 322 /* Get number of maximum RXQ */ 323 static int mvpp2_get_nrxqs(struct mvpp2 *priv) 324 { 325 unsigned int nrxqs; 326 327 if (priv->hw_version == MVPP22 && queue_mode == MVPP2_QDIST_SINGLE_MODE) 328 return 1; 329 330 /* According to the PPv2.2 datasheet and our experiments on 331 * PPv2.1, RX queues have an allocation granularity of 4 (when 332 * more than a single one on PPv2.2). 333 * Round up to nearest multiple of 4. 334 */ 335 nrxqs = (num_possible_cpus() + 3) & ~0x3; 336 if (nrxqs > MVPP2_PORT_MAX_RXQ) 337 nrxqs = MVPP2_PORT_MAX_RXQ; 338 339 return nrxqs; 340 } 341 342 /* Get number of physical egress port */ 343 static inline int mvpp2_egress_port(struct mvpp2_port *port) 344 { 345 return MVPP2_MAX_TCONT + port->id; 346 } 347 348 /* Get number of physical TXQ */ 349 static inline int mvpp2_txq_phys(int port, int txq) 350 { 351 return (MVPP2_MAX_TCONT + port) * MVPP2_MAX_TXQ + txq; 352 } 353 354 /* Returns a struct page if page_pool is set, otherwise a buffer */ 355 static void *mvpp2_frag_alloc(const struct mvpp2_bm_pool *pool, 356 struct page_pool *page_pool) 357 { 358 if (page_pool) 359 return page_pool_dev_alloc_pages(page_pool); 360 361 if (likely(pool->frag_size <= PAGE_SIZE)) 362 return netdev_alloc_frag(pool->frag_size); 363 364 return kmalloc(pool->frag_size, GFP_ATOMIC); 365 } 366 367 static void mvpp2_frag_free(const struct mvpp2_bm_pool *pool, 368 struct page_pool *page_pool, void *data) 369 { 370 if (page_pool) 371 page_pool_put_full_page(page_pool, virt_to_head_page(data), false); 372 else if (likely(pool->frag_size <= PAGE_SIZE)) 373 skb_free_frag(data); 374 else 375 kfree(data); 376 } 377 378 /* Buffer Manager configuration routines */ 379 380 /* Create pool */ 381 static int mvpp2_bm_pool_create(struct device *dev, struct mvpp2 *priv, 382 struct mvpp2_bm_pool *bm_pool, int size) 383 { 384 u32 val; 385 386 /* Number of buffer pointers must be a multiple of 16, as per 387 * hardware constraints 388 */ 389 if (!IS_ALIGNED(size, 16)) 390 return -EINVAL; 391 392 /* PPv2.1 needs 8 bytes per buffer pointer, PPv2.2 needs 16 393 * bytes per buffer pointer 394 */ 395 if (priv->hw_version == MVPP21) 396 bm_pool->size_bytes = 2 * sizeof(u32) * size; 397 else 398 bm_pool->size_bytes = 2 * sizeof(u64) * size; 399 400 bm_pool->virt_addr = dma_alloc_coherent(dev, bm_pool->size_bytes, 401 &bm_pool->dma_addr, 402 GFP_KERNEL); 403 if (!bm_pool->virt_addr) 404 return -ENOMEM; 405 406 if (!IS_ALIGNED((unsigned long)bm_pool->virt_addr, 407 MVPP2_BM_POOL_PTR_ALIGN)) { 408 dma_free_coherent(dev, bm_pool->size_bytes, 409 bm_pool->virt_addr, bm_pool->dma_addr); 410 dev_err(dev, "BM pool %d is not %d bytes aligned\n", 411 bm_pool->id, MVPP2_BM_POOL_PTR_ALIGN); 412 return -ENOMEM; 413 } 414 415 mvpp2_write(priv, MVPP2_BM_POOL_BASE_REG(bm_pool->id), 416 lower_32_bits(bm_pool->dma_addr)); 417 mvpp2_write(priv, MVPP2_BM_POOL_SIZE_REG(bm_pool->id), size); 418 419 val = mvpp2_read(priv, MVPP2_BM_POOL_CTRL_REG(bm_pool->id)); 420 val |= MVPP2_BM_START_MASK; 421 mvpp2_write(priv, MVPP2_BM_POOL_CTRL_REG(bm_pool->id), val); 422 423 bm_pool->size = size; 424 bm_pool->pkt_size = 0; 425 bm_pool->buf_num = 0; 426 427 return 0; 428 } 429 430 /* Set pool buffer size */ 431 static void mvpp2_bm_pool_bufsize_set(struct mvpp2 *priv, 432 struct mvpp2_bm_pool *bm_pool, 433 int buf_size) 434 { 435 u32 val; 436 437 bm_pool->buf_size = buf_size; 438 439 val = ALIGN(buf_size, 1 << MVPP2_POOL_BUF_SIZE_OFFSET); 440 mvpp2_write(priv, MVPP2_POOL_BUF_SIZE_REG(bm_pool->id), val); 441 } 442 443 static void mvpp2_bm_bufs_get_addrs(struct device *dev, struct mvpp2 *priv, 444 struct mvpp2_bm_pool *bm_pool, 445 dma_addr_t *dma_addr, 446 phys_addr_t *phys_addr) 447 { 448 unsigned int thread = mvpp2_cpu_to_thread(priv, get_cpu()); 449 450 *dma_addr = mvpp2_thread_read(priv, thread, 451 MVPP2_BM_PHY_ALLOC_REG(bm_pool->id)); 452 *phys_addr = mvpp2_thread_read(priv, thread, MVPP2_BM_VIRT_ALLOC_REG); 453 454 if (priv->hw_version == MVPP22) { 455 u32 val; 456 u32 dma_addr_highbits, phys_addr_highbits; 457 458 val = mvpp2_thread_read(priv, thread, MVPP22_BM_ADDR_HIGH_ALLOC); 459 dma_addr_highbits = (val & MVPP22_BM_ADDR_HIGH_PHYS_MASK); 460 phys_addr_highbits = (val & MVPP22_BM_ADDR_HIGH_VIRT_MASK) >> 461 MVPP22_BM_ADDR_HIGH_VIRT_SHIFT; 462 463 if (sizeof(dma_addr_t) == 8) 464 *dma_addr |= (u64)dma_addr_highbits << 32; 465 466 if (sizeof(phys_addr_t) == 8) 467 *phys_addr |= (u64)phys_addr_highbits << 32; 468 } 469 470 put_cpu(); 471 } 472 473 /* Free all buffers from the pool */ 474 static void mvpp2_bm_bufs_free(struct device *dev, struct mvpp2 *priv, 475 struct mvpp2_bm_pool *bm_pool, int buf_num) 476 { 477 struct page_pool *pp = NULL; 478 int i; 479 480 if (buf_num > bm_pool->buf_num) { 481 WARN(1, "Pool does not have so many bufs pool(%d) bufs(%d)\n", 482 bm_pool->id, buf_num); 483 buf_num = bm_pool->buf_num; 484 } 485 486 if (priv->percpu_pools) 487 pp = priv->page_pool[bm_pool->id]; 488 489 for (i = 0; i < buf_num; i++) { 490 dma_addr_t buf_dma_addr; 491 phys_addr_t buf_phys_addr; 492 void *data; 493 494 mvpp2_bm_bufs_get_addrs(dev, priv, bm_pool, 495 &buf_dma_addr, &buf_phys_addr); 496 497 if (!pp) 498 dma_unmap_single(dev, buf_dma_addr, 499 bm_pool->buf_size, DMA_FROM_DEVICE); 500 501 data = (void *)phys_to_virt(buf_phys_addr); 502 if (!data) 503 break; 504 505 mvpp2_frag_free(bm_pool, pp, data); 506 } 507 508 /* Update BM driver with number of buffers removed from pool */ 509 bm_pool->buf_num -= i; 510 } 511 512 /* Check number of buffers in BM pool */ 513 static int mvpp2_check_hw_buf_num(struct mvpp2 *priv, struct mvpp2_bm_pool *bm_pool) 514 { 515 int buf_num = 0; 516 517 buf_num += mvpp2_read(priv, MVPP2_BM_POOL_PTRS_NUM_REG(bm_pool->id)) & 518 MVPP22_BM_POOL_PTRS_NUM_MASK; 519 buf_num += mvpp2_read(priv, MVPP2_BM_BPPI_PTRS_NUM_REG(bm_pool->id)) & 520 MVPP2_BM_BPPI_PTR_NUM_MASK; 521 522 /* HW has one buffer ready which is not reflected in the counters */ 523 if (buf_num) 524 buf_num += 1; 525 526 return buf_num; 527 } 528 529 /* Cleanup pool */ 530 static int mvpp2_bm_pool_destroy(struct device *dev, struct mvpp2 *priv, 531 struct mvpp2_bm_pool *bm_pool) 532 { 533 int buf_num; 534 u32 val; 535 536 buf_num = mvpp2_check_hw_buf_num(priv, bm_pool); 537 mvpp2_bm_bufs_free(dev, priv, bm_pool, buf_num); 538 539 /* Check buffer counters after free */ 540 buf_num = mvpp2_check_hw_buf_num(priv, bm_pool); 541 if (buf_num) { 542 WARN(1, "cannot free all buffers in pool %d, buf_num left %d\n", 543 bm_pool->id, bm_pool->buf_num); 544 return 0; 545 } 546 547 val = mvpp2_read(priv, MVPP2_BM_POOL_CTRL_REG(bm_pool->id)); 548 val |= MVPP2_BM_STOP_MASK; 549 mvpp2_write(priv, MVPP2_BM_POOL_CTRL_REG(bm_pool->id), val); 550 551 if (priv->percpu_pools) { 552 page_pool_destroy(priv->page_pool[bm_pool->id]); 553 priv->page_pool[bm_pool->id] = NULL; 554 } 555 556 dma_free_coherent(dev, bm_pool->size_bytes, 557 bm_pool->virt_addr, 558 bm_pool->dma_addr); 559 return 0; 560 } 561 562 static int mvpp2_bm_pools_init(struct device *dev, struct mvpp2 *priv) 563 { 564 int i, err, size, poolnum = MVPP2_BM_POOLS_NUM; 565 struct mvpp2_bm_pool *bm_pool; 566 567 if (priv->percpu_pools) 568 poolnum = mvpp2_get_nrxqs(priv) * 2; 569 570 /* Create all pools with maximum size */ 571 size = MVPP2_BM_POOL_SIZE_MAX; 572 for (i = 0; i < poolnum; i++) { 573 bm_pool = &priv->bm_pools[i]; 574 bm_pool->id = i; 575 err = mvpp2_bm_pool_create(dev, priv, bm_pool, size); 576 if (err) 577 goto err_unroll_pools; 578 mvpp2_bm_pool_bufsize_set(priv, bm_pool, 0); 579 } 580 return 0; 581 582 err_unroll_pools: 583 dev_err(dev, "failed to create BM pool %d, size %d\n", i, size); 584 for (i = i - 1; i >= 0; i--) 585 mvpp2_bm_pool_destroy(dev, priv, &priv->bm_pools[i]); 586 return err; 587 } 588 589 static int mvpp2_bm_init(struct device *dev, struct mvpp2 *priv) 590 { 591 enum dma_data_direction dma_dir = DMA_FROM_DEVICE; 592 int i, err, poolnum = MVPP2_BM_POOLS_NUM; 593 struct mvpp2_port *port; 594 595 if (priv->percpu_pools) { 596 for (i = 0; i < priv->port_count; i++) { 597 port = priv->port_list[i]; 598 if (port->xdp_prog) { 599 dma_dir = DMA_BIDIRECTIONAL; 600 break; 601 } 602 } 603 604 poolnum = mvpp2_get_nrxqs(priv) * 2; 605 for (i = 0; i < poolnum; i++) { 606 /* the pool in use */ 607 int pn = i / (poolnum / 2); 608 609 priv->page_pool[i] = 610 mvpp2_create_page_pool(dev, 611 mvpp2_pools[pn].buf_num, 612 mvpp2_pools[pn].pkt_size, 613 dma_dir); 614 if (IS_ERR(priv->page_pool[i])) { 615 int j; 616 617 for (j = 0; j < i; j++) { 618 page_pool_destroy(priv->page_pool[j]); 619 priv->page_pool[j] = NULL; 620 } 621 return PTR_ERR(priv->page_pool[i]); 622 } 623 } 624 } 625 626 dev_info(dev, "using %d %s buffers\n", poolnum, 627 priv->percpu_pools ? "per-cpu" : "shared"); 628 629 for (i = 0; i < poolnum; i++) { 630 /* Mask BM all interrupts */ 631 mvpp2_write(priv, MVPP2_BM_INTR_MASK_REG(i), 0); 632 /* Clear BM cause register */ 633 mvpp2_write(priv, MVPP2_BM_INTR_CAUSE_REG(i), 0); 634 } 635 636 /* Allocate and initialize BM pools */ 637 priv->bm_pools = devm_kcalloc(dev, poolnum, 638 sizeof(*priv->bm_pools), GFP_KERNEL); 639 if (!priv->bm_pools) 640 return -ENOMEM; 641 642 err = mvpp2_bm_pools_init(dev, priv); 643 if (err < 0) 644 return err; 645 return 0; 646 } 647 648 static void mvpp2_setup_bm_pool(void) 649 { 650 /* Short pool */ 651 mvpp2_pools[MVPP2_BM_SHORT].buf_num = MVPP2_BM_SHORT_BUF_NUM; 652 mvpp2_pools[MVPP2_BM_SHORT].pkt_size = MVPP2_BM_SHORT_PKT_SIZE; 653 654 /* Long pool */ 655 mvpp2_pools[MVPP2_BM_LONG].buf_num = MVPP2_BM_LONG_BUF_NUM; 656 mvpp2_pools[MVPP2_BM_LONG].pkt_size = MVPP2_BM_LONG_PKT_SIZE; 657 658 /* Jumbo pool */ 659 mvpp2_pools[MVPP2_BM_JUMBO].buf_num = MVPP2_BM_JUMBO_BUF_NUM; 660 mvpp2_pools[MVPP2_BM_JUMBO].pkt_size = MVPP2_BM_JUMBO_PKT_SIZE; 661 } 662 663 /* Attach long pool to rxq */ 664 static void mvpp2_rxq_long_pool_set(struct mvpp2_port *port, 665 int lrxq, int long_pool) 666 { 667 u32 val, mask; 668 int prxq; 669 670 /* Get queue physical ID */ 671 prxq = port->rxqs[lrxq]->id; 672 673 if (port->priv->hw_version == MVPP21) 674 mask = MVPP21_RXQ_POOL_LONG_MASK; 675 else 676 mask = MVPP22_RXQ_POOL_LONG_MASK; 677 678 val = mvpp2_read(port->priv, MVPP2_RXQ_CONFIG_REG(prxq)); 679 val &= ~mask; 680 val |= (long_pool << MVPP2_RXQ_POOL_LONG_OFFS) & mask; 681 mvpp2_write(port->priv, MVPP2_RXQ_CONFIG_REG(prxq), val); 682 } 683 684 /* Attach short pool to rxq */ 685 static void mvpp2_rxq_short_pool_set(struct mvpp2_port *port, 686 int lrxq, int short_pool) 687 { 688 u32 val, mask; 689 int prxq; 690 691 /* Get queue physical ID */ 692 prxq = port->rxqs[lrxq]->id; 693 694 if (port->priv->hw_version == MVPP21) 695 mask = MVPP21_RXQ_POOL_SHORT_MASK; 696 else 697 mask = MVPP22_RXQ_POOL_SHORT_MASK; 698 699 val = mvpp2_read(port->priv, MVPP2_RXQ_CONFIG_REG(prxq)); 700 val &= ~mask; 701 val |= (short_pool << MVPP2_RXQ_POOL_SHORT_OFFS) & mask; 702 mvpp2_write(port->priv, MVPP2_RXQ_CONFIG_REG(prxq), val); 703 } 704 705 static void *mvpp2_buf_alloc(struct mvpp2_port *port, 706 struct mvpp2_bm_pool *bm_pool, 707 struct page_pool *page_pool, 708 dma_addr_t *buf_dma_addr, 709 phys_addr_t *buf_phys_addr, 710 gfp_t gfp_mask) 711 { 712 dma_addr_t dma_addr; 713 struct page *page; 714 void *data; 715 716 data = mvpp2_frag_alloc(bm_pool, page_pool); 717 if (!data) 718 return NULL; 719 720 if (page_pool) { 721 page = (struct page *)data; 722 dma_addr = page_pool_get_dma_addr(page); 723 data = page_to_virt(page); 724 } else { 725 dma_addr = dma_map_single(port->dev->dev.parent, data, 726 MVPP2_RX_BUF_SIZE(bm_pool->pkt_size), 727 DMA_FROM_DEVICE); 728 if (unlikely(dma_mapping_error(port->dev->dev.parent, dma_addr))) { 729 mvpp2_frag_free(bm_pool, NULL, data); 730 return NULL; 731 } 732 } 733 *buf_dma_addr = dma_addr; 734 *buf_phys_addr = virt_to_phys(data); 735 736 return data; 737 } 738 739 /* Release buffer to BM */ 740 static inline void mvpp2_bm_pool_put(struct mvpp2_port *port, int pool, 741 dma_addr_t buf_dma_addr, 742 phys_addr_t buf_phys_addr) 743 { 744 unsigned int thread = mvpp2_cpu_to_thread(port->priv, get_cpu()); 745 unsigned long flags = 0; 746 747 if (test_bit(thread, &port->priv->lock_map)) 748 spin_lock_irqsave(&port->bm_lock[thread], flags); 749 750 if (port->priv->hw_version == MVPP22) { 751 u32 val = 0; 752 753 if (sizeof(dma_addr_t) == 8) 754 val |= upper_32_bits(buf_dma_addr) & 755 MVPP22_BM_ADDR_HIGH_PHYS_RLS_MASK; 756 757 if (sizeof(phys_addr_t) == 8) 758 val |= (upper_32_bits(buf_phys_addr) 759 << MVPP22_BM_ADDR_HIGH_VIRT_RLS_SHIFT) & 760 MVPP22_BM_ADDR_HIGH_VIRT_RLS_MASK; 761 762 mvpp2_thread_write_relaxed(port->priv, thread, 763 MVPP22_BM_ADDR_HIGH_RLS_REG, val); 764 } 765 766 /* MVPP2_BM_VIRT_RLS_REG is not interpreted by HW, and simply 767 * returned in the "cookie" field of the RX 768 * descriptor. Instead of storing the virtual address, we 769 * store the physical address 770 */ 771 mvpp2_thread_write_relaxed(port->priv, thread, 772 MVPP2_BM_VIRT_RLS_REG, buf_phys_addr); 773 mvpp2_thread_write_relaxed(port->priv, thread, 774 MVPP2_BM_PHY_RLS_REG(pool), buf_dma_addr); 775 776 if (test_bit(thread, &port->priv->lock_map)) 777 spin_unlock_irqrestore(&port->bm_lock[thread], flags); 778 779 put_cpu(); 780 } 781 782 /* Allocate buffers for the pool */ 783 static int mvpp2_bm_bufs_add(struct mvpp2_port *port, 784 struct mvpp2_bm_pool *bm_pool, int buf_num) 785 { 786 int i, buf_size, total_size; 787 dma_addr_t dma_addr; 788 phys_addr_t phys_addr; 789 struct page_pool *pp = NULL; 790 void *buf; 791 792 if (port->priv->percpu_pools && 793 bm_pool->pkt_size > MVPP2_BM_LONG_PKT_SIZE) { 794 netdev_err(port->dev, 795 "attempted to use jumbo frames with per-cpu pools"); 796 return 0; 797 } 798 799 buf_size = MVPP2_RX_BUF_SIZE(bm_pool->pkt_size); 800 total_size = MVPP2_RX_TOTAL_SIZE(buf_size); 801 802 if (buf_num < 0 || 803 (buf_num + bm_pool->buf_num > bm_pool->size)) { 804 netdev_err(port->dev, 805 "cannot allocate %d buffers for pool %d\n", 806 buf_num, bm_pool->id); 807 return 0; 808 } 809 810 if (port->priv->percpu_pools) 811 pp = port->priv->page_pool[bm_pool->id]; 812 for (i = 0; i < buf_num; i++) { 813 buf = mvpp2_buf_alloc(port, bm_pool, pp, &dma_addr, 814 &phys_addr, GFP_KERNEL); 815 if (!buf) 816 break; 817 818 mvpp2_bm_pool_put(port, bm_pool->id, dma_addr, 819 phys_addr); 820 } 821 822 /* Update BM driver with number of buffers added to pool */ 823 bm_pool->buf_num += i; 824 825 netdev_dbg(port->dev, 826 "pool %d: pkt_size=%4d, buf_size=%4d, total_size=%4d\n", 827 bm_pool->id, bm_pool->pkt_size, buf_size, total_size); 828 829 netdev_dbg(port->dev, 830 "pool %d: %d of %d buffers added\n", 831 bm_pool->id, i, buf_num); 832 return i; 833 } 834 835 /* Notify the driver that BM pool is being used as specific type and return the 836 * pool pointer on success 837 */ 838 static struct mvpp2_bm_pool * 839 mvpp2_bm_pool_use(struct mvpp2_port *port, unsigned pool, int pkt_size) 840 { 841 struct mvpp2_bm_pool *new_pool = &port->priv->bm_pools[pool]; 842 int num; 843 844 if ((port->priv->percpu_pools && pool > mvpp2_get_nrxqs(port->priv) * 2) || 845 (!port->priv->percpu_pools && pool >= MVPP2_BM_POOLS_NUM)) { 846 netdev_err(port->dev, "Invalid pool %d\n", pool); 847 return NULL; 848 } 849 850 /* Allocate buffers in case BM pool is used as long pool, but packet 851 * size doesn't match MTU or BM pool hasn't being used yet 852 */ 853 if (new_pool->pkt_size == 0) { 854 int pkts_num; 855 856 /* Set default buffer number or free all the buffers in case 857 * the pool is not empty 858 */ 859 pkts_num = new_pool->buf_num; 860 if (pkts_num == 0) { 861 if (port->priv->percpu_pools) { 862 if (pool < port->nrxqs) 863 pkts_num = mvpp2_pools[MVPP2_BM_SHORT].buf_num; 864 else 865 pkts_num = mvpp2_pools[MVPP2_BM_LONG].buf_num; 866 } else { 867 pkts_num = mvpp2_pools[pool].buf_num; 868 } 869 } else { 870 mvpp2_bm_bufs_free(port->dev->dev.parent, 871 port->priv, new_pool, pkts_num); 872 } 873 874 new_pool->pkt_size = pkt_size; 875 new_pool->frag_size = 876 SKB_DATA_ALIGN(MVPP2_RX_BUF_SIZE(pkt_size)) + 877 MVPP2_SKB_SHINFO_SIZE; 878 879 /* Allocate buffers for this pool */ 880 num = mvpp2_bm_bufs_add(port, new_pool, pkts_num); 881 if (num != pkts_num) { 882 WARN(1, "pool %d: %d of %d allocated\n", 883 new_pool->id, num, pkts_num); 884 return NULL; 885 } 886 } 887 888 mvpp2_bm_pool_bufsize_set(port->priv, new_pool, 889 MVPP2_RX_BUF_SIZE(new_pool->pkt_size)); 890 891 return new_pool; 892 } 893 894 static struct mvpp2_bm_pool * 895 mvpp2_bm_pool_use_percpu(struct mvpp2_port *port, int type, 896 unsigned int pool, int pkt_size) 897 { 898 struct mvpp2_bm_pool *new_pool = &port->priv->bm_pools[pool]; 899 int num; 900 901 if (pool > port->nrxqs * 2) { 902 netdev_err(port->dev, "Invalid pool %d\n", pool); 903 return NULL; 904 } 905 906 /* Allocate buffers in case BM pool is used as long pool, but packet 907 * size doesn't match MTU or BM pool hasn't being used yet 908 */ 909 if (new_pool->pkt_size == 0) { 910 int pkts_num; 911 912 /* Set default buffer number or free all the buffers in case 913 * the pool is not empty 914 */ 915 pkts_num = new_pool->buf_num; 916 if (pkts_num == 0) 917 pkts_num = mvpp2_pools[type].buf_num; 918 else 919 mvpp2_bm_bufs_free(port->dev->dev.parent, 920 port->priv, new_pool, pkts_num); 921 922 new_pool->pkt_size = pkt_size; 923 new_pool->frag_size = 924 SKB_DATA_ALIGN(MVPP2_RX_BUF_SIZE(pkt_size)) + 925 MVPP2_SKB_SHINFO_SIZE; 926 927 /* Allocate buffers for this pool */ 928 num = mvpp2_bm_bufs_add(port, new_pool, pkts_num); 929 if (num != pkts_num) { 930 WARN(1, "pool %d: %d of %d allocated\n", 931 new_pool->id, num, pkts_num); 932 return NULL; 933 } 934 } 935 936 mvpp2_bm_pool_bufsize_set(port->priv, new_pool, 937 MVPP2_RX_BUF_SIZE(new_pool->pkt_size)); 938 939 return new_pool; 940 } 941 942 /* Initialize pools for swf, shared buffers variant */ 943 static int mvpp2_swf_bm_pool_init_shared(struct mvpp2_port *port) 944 { 945 enum mvpp2_bm_pool_log_num long_log_pool, short_log_pool; 946 int rxq; 947 948 /* If port pkt_size is higher than 1518B: 949 * HW Long pool - SW Jumbo pool, HW Short pool - SW Long pool 950 * else: HW Long pool - SW Long pool, HW Short pool - SW Short pool 951 */ 952 if (port->pkt_size > MVPP2_BM_LONG_PKT_SIZE) { 953 long_log_pool = MVPP2_BM_JUMBO; 954 short_log_pool = MVPP2_BM_LONG; 955 } else { 956 long_log_pool = MVPP2_BM_LONG; 957 short_log_pool = MVPP2_BM_SHORT; 958 } 959 960 if (!port->pool_long) { 961 port->pool_long = 962 mvpp2_bm_pool_use(port, long_log_pool, 963 mvpp2_pools[long_log_pool].pkt_size); 964 if (!port->pool_long) 965 return -ENOMEM; 966 967 port->pool_long->port_map |= BIT(port->id); 968 969 for (rxq = 0; rxq < port->nrxqs; rxq++) 970 mvpp2_rxq_long_pool_set(port, rxq, port->pool_long->id); 971 } 972 973 if (!port->pool_short) { 974 port->pool_short = 975 mvpp2_bm_pool_use(port, short_log_pool, 976 mvpp2_pools[short_log_pool].pkt_size); 977 if (!port->pool_short) 978 return -ENOMEM; 979 980 port->pool_short->port_map |= BIT(port->id); 981 982 for (rxq = 0; rxq < port->nrxqs; rxq++) 983 mvpp2_rxq_short_pool_set(port, rxq, 984 port->pool_short->id); 985 } 986 987 return 0; 988 } 989 990 /* Initialize pools for swf, percpu buffers variant */ 991 static int mvpp2_swf_bm_pool_init_percpu(struct mvpp2_port *port) 992 { 993 struct mvpp2_bm_pool *bm_pool; 994 int i; 995 996 for (i = 0; i < port->nrxqs; i++) { 997 bm_pool = mvpp2_bm_pool_use_percpu(port, MVPP2_BM_SHORT, i, 998 mvpp2_pools[MVPP2_BM_SHORT].pkt_size); 999 if (!bm_pool) 1000 return -ENOMEM; 1001 1002 bm_pool->port_map |= BIT(port->id); 1003 mvpp2_rxq_short_pool_set(port, i, bm_pool->id); 1004 } 1005 1006 for (i = 0; i < port->nrxqs; i++) { 1007 bm_pool = mvpp2_bm_pool_use_percpu(port, MVPP2_BM_LONG, i + port->nrxqs, 1008 mvpp2_pools[MVPP2_BM_LONG].pkt_size); 1009 if (!bm_pool) 1010 return -ENOMEM; 1011 1012 bm_pool->port_map |= BIT(port->id); 1013 mvpp2_rxq_long_pool_set(port, i, bm_pool->id); 1014 } 1015 1016 port->pool_long = NULL; 1017 port->pool_short = NULL; 1018 1019 return 0; 1020 } 1021 1022 static int mvpp2_swf_bm_pool_init(struct mvpp2_port *port) 1023 { 1024 if (port->priv->percpu_pools) 1025 return mvpp2_swf_bm_pool_init_percpu(port); 1026 else 1027 return mvpp2_swf_bm_pool_init_shared(port); 1028 } 1029 1030 static void mvpp2_set_hw_csum(struct mvpp2_port *port, 1031 enum mvpp2_bm_pool_log_num new_long_pool) 1032 { 1033 const netdev_features_t csums = NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM; 1034 1035 /* Update L4 checksum when jumbo enable/disable on port. 1036 * Only port 0 supports hardware checksum offload due to 1037 * the Tx FIFO size limitation. 1038 * Also, don't set NETIF_F_HW_CSUM because L3_offset in TX descriptor 1039 * has 7 bits, so the maximum L3 offset is 128. 1040 */ 1041 if (new_long_pool == MVPP2_BM_JUMBO && port->id != 0) { 1042 port->dev->features &= ~csums; 1043 port->dev->hw_features &= ~csums; 1044 } else { 1045 port->dev->features |= csums; 1046 port->dev->hw_features |= csums; 1047 } 1048 } 1049 1050 static int mvpp2_bm_update_mtu(struct net_device *dev, int mtu) 1051 { 1052 struct mvpp2_port *port = netdev_priv(dev); 1053 enum mvpp2_bm_pool_log_num new_long_pool; 1054 int pkt_size = MVPP2_RX_PKT_SIZE(mtu); 1055 1056 if (port->priv->percpu_pools) 1057 goto out_set; 1058 1059 /* If port MTU is higher than 1518B: 1060 * HW Long pool - SW Jumbo pool, HW Short pool - SW Long pool 1061 * else: HW Long pool - SW Long pool, HW Short pool - SW Short pool 1062 */ 1063 if (pkt_size > MVPP2_BM_LONG_PKT_SIZE) 1064 new_long_pool = MVPP2_BM_JUMBO; 1065 else 1066 new_long_pool = MVPP2_BM_LONG; 1067 1068 if (new_long_pool != port->pool_long->id) { 1069 /* Remove port from old short & long pool */ 1070 port->pool_long = mvpp2_bm_pool_use(port, port->pool_long->id, 1071 port->pool_long->pkt_size); 1072 port->pool_long->port_map &= ~BIT(port->id); 1073 port->pool_long = NULL; 1074 1075 port->pool_short = mvpp2_bm_pool_use(port, port->pool_short->id, 1076 port->pool_short->pkt_size); 1077 port->pool_short->port_map &= ~BIT(port->id); 1078 port->pool_short = NULL; 1079 1080 port->pkt_size = pkt_size; 1081 1082 /* Add port to new short & long pool */ 1083 mvpp2_swf_bm_pool_init(port); 1084 1085 mvpp2_set_hw_csum(port, new_long_pool); 1086 } 1087 1088 out_set: 1089 dev->mtu = mtu; 1090 dev->wanted_features = dev->features; 1091 1092 netdev_update_features(dev); 1093 return 0; 1094 } 1095 1096 static inline void mvpp2_interrupts_enable(struct mvpp2_port *port) 1097 { 1098 int i, sw_thread_mask = 0; 1099 1100 for (i = 0; i < port->nqvecs; i++) 1101 sw_thread_mask |= port->qvecs[i].sw_thread_mask; 1102 1103 mvpp2_write(port->priv, MVPP2_ISR_ENABLE_REG(port->id), 1104 MVPP2_ISR_ENABLE_INTERRUPT(sw_thread_mask)); 1105 } 1106 1107 static inline void mvpp2_interrupts_disable(struct mvpp2_port *port) 1108 { 1109 int i, sw_thread_mask = 0; 1110 1111 for (i = 0; i < port->nqvecs; i++) 1112 sw_thread_mask |= port->qvecs[i].sw_thread_mask; 1113 1114 mvpp2_write(port->priv, MVPP2_ISR_ENABLE_REG(port->id), 1115 MVPP2_ISR_DISABLE_INTERRUPT(sw_thread_mask)); 1116 } 1117 1118 static inline void mvpp2_qvec_interrupt_enable(struct mvpp2_queue_vector *qvec) 1119 { 1120 struct mvpp2_port *port = qvec->port; 1121 1122 mvpp2_write(port->priv, MVPP2_ISR_ENABLE_REG(port->id), 1123 MVPP2_ISR_ENABLE_INTERRUPT(qvec->sw_thread_mask)); 1124 } 1125 1126 static inline void mvpp2_qvec_interrupt_disable(struct mvpp2_queue_vector *qvec) 1127 { 1128 struct mvpp2_port *port = qvec->port; 1129 1130 mvpp2_write(port->priv, MVPP2_ISR_ENABLE_REG(port->id), 1131 MVPP2_ISR_DISABLE_INTERRUPT(qvec->sw_thread_mask)); 1132 } 1133 1134 /* Mask the current thread's Rx/Tx interrupts 1135 * Called by on_each_cpu(), guaranteed to run with migration disabled, 1136 * using smp_processor_id() is OK. 1137 */ 1138 static void mvpp2_interrupts_mask(void *arg) 1139 { 1140 struct mvpp2_port *port = arg; 1141 1142 /* If the thread isn't used, don't do anything */ 1143 if (smp_processor_id() > port->priv->nthreads) 1144 return; 1145 1146 mvpp2_thread_write(port->priv, 1147 mvpp2_cpu_to_thread(port->priv, smp_processor_id()), 1148 MVPP2_ISR_RX_TX_MASK_REG(port->id), 0); 1149 } 1150 1151 /* Unmask the current thread's Rx/Tx interrupts. 1152 * Called by on_each_cpu(), guaranteed to run with migration disabled, 1153 * using smp_processor_id() is OK. 1154 */ 1155 static void mvpp2_interrupts_unmask(void *arg) 1156 { 1157 struct mvpp2_port *port = arg; 1158 u32 val; 1159 1160 /* If the thread isn't used, don't do anything */ 1161 if (smp_processor_id() > port->priv->nthreads) 1162 return; 1163 1164 val = MVPP2_CAUSE_MISC_SUM_MASK | 1165 MVPP2_CAUSE_RXQ_OCCUP_DESC_ALL_MASK(port->priv->hw_version); 1166 if (port->has_tx_irqs) 1167 val |= MVPP2_CAUSE_TXQ_OCCUP_DESC_ALL_MASK; 1168 1169 mvpp2_thread_write(port->priv, 1170 mvpp2_cpu_to_thread(port->priv, smp_processor_id()), 1171 MVPP2_ISR_RX_TX_MASK_REG(port->id), val); 1172 } 1173 1174 static void 1175 mvpp2_shared_interrupt_mask_unmask(struct mvpp2_port *port, bool mask) 1176 { 1177 u32 val; 1178 int i; 1179 1180 if (port->priv->hw_version != MVPP22) 1181 return; 1182 1183 if (mask) 1184 val = 0; 1185 else 1186 val = MVPP2_CAUSE_RXQ_OCCUP_DESC_ALL_MASK(MVPP22); 1187 1188 for (i = 0; i < port->nqvecs; i++) { 1189 struct mvpp2_queue_vector *v = port->qvecs + i; 1190 1191 if (v->type != MVPP2_QUEUE_VECTOR_SHARED) 1192 continue; 1193 1194 mvpp2_thread_write(port->priv, v->sw_thread_id, 1195 MVPP2_ISR_RX_TX_MASK_REG(port->id), val); 1196 } 1197 } 1198 1199 /* Only GOP port 0 has an XLG MAC */ 1200 static bool mvpp2_port_supports_xlg(struct mvpp2_port *port) 1201 { 1202 return port->gop_id == 0; 1203 } 1204 1205 static bool mvpp2_port_supports_rgmii(struct mvpp2_port *port) 1206 { 1207 return !(port->priv->hw_version == MVPP22 && port->gop_id == 0); 1208 } 1209 1210 /* Port configuration routines */ 1211 static bool mvpp2_is_xlg(phy_interface_t interface) 1212 { 1213 return interface == PHY_INTERFACE_MODE_10GBASER || 1214 interface == PHY_INTERFACE_MODE_XAUI; 1215 } 1216 1217 static void mvpp2_modify(void __iomem *ptr, u32 mask, u32 set) 1218 { 1219 u32 old, val; 1220 1221 old = val = readl(ptr); 1222 val &= ~mask; 1223 val |= set; 1224 if (old != val) 1225 writel(val, ptr); 1226 } 1227 1228 static void mvpp22_gop_init_rgmii(struct mvpp2_port *port) 1229 { 1230 struct mvpp2 *priv = port->priv; 1231 u32 val; 1232 1233 regmap_read(priv->sysctrl_base, GENCONF_PORT_CTRL0, &val); 1234 val |= GENCONF_PORT_CTRL0_BUS_WIDTH_SELECT; 1235 regmap_write(priv->sysctrl_base, GENCONF_PORT_CTRL0, val); 1236 1237 regmap_read(priv->sysctrl_base, GENCONF_CTRL0, &val); 1238 if (port->gop_id == 2) 1239 val |= GENCONF_CTRL0_PORT0_RGMII | GENCONF_CTRL0_PORT1_RGMII; 1240 else if (port->gop_id == 3) 1241 val |= GENCONF_CTRL0_PORT1_RGMII_MII; 1242 regmap_write(priv->sysctrl_base, GENCONF_CTRL0, val); 1243 } 1244 1245 static void mvpp22_gop_init_sgmii(struct mvpp2_port *port) 1246 { 1247 struct mvpp2 *priv = port->priv; 1248 u32 val; 1249 1250 regmap_read(priv->sysctrl_base, GENCONF_PORT_CTRL0, &val); 1251 val |= GENCONF_PORT_CTRL0_BUS_WIDTH_SELECT | 1252 GENCONF_PORT_CTRL0_RX_DATA_SAMPLE; 1253 regmap_write(priv->sysctrl_base, GENCONF_PORT_CTRL0, val); 1254 1255 if (port->gop_id > 1) { 1256 regmap_read(priv->sysctrl_base, GENCONF_CTRL0, &val); 1257 if (port->gop_id == 2) 1258 val &= ~GENCONF_CTRL0_PORT0_RGMII; 1259 else if (port->gop_id == 3) 1260 val &= ~GENCONF_CTRL0_PORT1_RGMII_MII; 1261 regmap_write(priv->sysctrl_base, GENCONF_CTRL0, val); 1262 } 1263 } 1264 1265 static void mvpp22_gop_init_10gkr(struct mvpp2_port *port) 1266 { 1267 struct mvpp2 *priv = port->priv; 1268 void __iomem *mpcs = priv->iface_base + MVPP22_MPCS_BASE(port->gop_id); 1269 void __iomem *xpcs = priv->iface_base + MVPP22_XPCS_BASE(port->gop_id); 1270 u32 val; 1271 1272 val = readl(xpcs + MVPP22_XPCS_CFG0); 1273 val &= ~(MVPP22_XPCS_CFG0_PCS_MODE(0x3) | 1274 MVPP22_XPCS_CFG0_ACTIVE_LANE(0x3)); 1275 val |= MVPP22_XPCS_CFG0_ACTIVE_LANE(2); 1276 writel(val, xpcs + MVPP22_XPCS_CFG0); 1277 1278 val = readl(mpcs + MVPP22_MPCS_CTRL); 1279 val &= ~MVPP22_MPCS_CTRL_FWD_ERR_CONN; 1280 writel(val, mpcs + MVPP22_MPCS_CTRL); 1281 1282 val = readl(mpcs + MVPP22_MPCS_CLK_RESET); 1283 val &= ~MVPP22_MPCS_CLK_RESET_DIV_RATIO(0x7); 1284 val |= MVPP22_MPCS_CLK_RESET_DIV_RATIO(1); 1285 writel(val, mpcs + MVPP22_MPCS_CLK_RESET); 1286 } 1287 1288 static int mvpp22_gop_init(struct mvpp2_port *port) 1289 { 1290 struct mvpp2 *priv = port->priv; 1291 u32 val; 1292 1293 if (!priv->sysctrl_base) 1294 return 0; 1295 1296 switch (port->phy_interface) { 1297 case PHY_INTERFACE_MODE_RGMII: 1298 case PHY_INTERFACE_MODE_RGMII_ID: 1299 case PHY_INTERFACE_MODE_RGMII_RXID: 1300 case PHY_INTERFACE_MODE_RGMII_TXID: 1301 if (!mvpp2_port_supports_rgmii(port)) 1302 goto invalid_conf; 1303 mvpp22_gop_init_rgmii(port); 1304 break; 1305 case PHY_INTERFACE_MODE_SGMII: 1306 case PHY_INTERFACE_MODE_1000BASEX: 1307 case PHY_INTERFACE_MODE_2500BASEX: 1308 mvpp22_gop_init_sgmii(port); 1309 break; 1310 case PHY_INTERFACE_MODE_10GBASER: 1311 if (!mvpp2_port_supports_xlg(port)) 1312 goto invalid_conf; 1313 mvpp22_gop_init_10gkr(port); 1314 break; 1315 default: 1316 goto unsupported_conf; 1317 } 1318 1319 regmap_read(priv->sysctrl_base, GENCONF_PORT_CTRL1, &val); 1320 val |= GENCONF_PORT_CTRL1_RESET(port->gop_id) | 1321 GENCONF_PORT_CTRL1_EN(port->gop_id); 1322 regmap_write(priv->sysctrl_base, GENCONF_PORT_CTRL1, val); 1323 1324 regmap_read(priv->sysctrl_base, GENCONF_PORT_CTRL0, &val); 1325 val |= GENCONF_PORT_CTRL0_CLK_DIV_PHASE_CLR; 1326 regmap_write(priv->sysctrl_base, GENCONF_PORT_CTRL0, val); 1327 1328 regmap_read(priv->sysctrl_base, GENCONF_SOFT_RESET1, &val); 1329 val |= GENCONF_SOFT_RESET1_GOP; 1330 regmap_write(priv->sysctrl_base, GENCONF_SOFT_RESET1, val); 1331 1332 unsupported_conf: 1333 return 0; 1334 1335 invalid_conf: 1336 netdev_err(port->dev, "Invalid port configuration\n"); 1337 return -EINVAL; 1338 } 1339 1340 static void mvpp22_gop_unmask_irq(struct mvpp2_port *port) 1341 { 1342 u32 val; 1343 1344 if (phy_interface_mode_is_rgmii(port->phy_interface) || 1345 phy_interface_mode_is_8023z(port->phy_interface) || 1346 port->phy_interface == PHY_INTERFACE_MODE_SGMII) { 1347 /* Enable the GMAC link status irq for this port */ 1348 val = readl(port->base + MVPP22_GMAC_INT_SUM_MASK); 1349 val |= MVPP22_GMAC_INT_SUM_MASK_LINK_STAT; 1350 writel(val, port->base + MVPP22_GMAC_INT_SUM_MASK); 1351 } 1352 1353 if (mvpp2_port_supports_xlg(port)) { 1354 /* Enable the XLG/GIG irqs for this port */ 1355 val = readl(port->base + MVPP22_XLG_EXT_INT_MASK); 1356 if (mvpp2_is_xlg(port->phy_interface)) 1357 val |= MVPP22_XLG_EXT_INT_MASK_XLG; 1358 else 1359 val |= MVPP22_XLG_EXT_INT_MASK_GIG; 1360 writel(val, port->base + MVPP22_XLG_EXT_INT_MASK); 1361 } 1362 } 1363 1364 static void mvpp22_gop_mask_irq(struct mvpp2_port *port) 1365 { 1366 u32 val; 1367 1368 if (mvpp2_port_supports_xlg(port)) { 1369 val = readl(port->base + MVPP22_XLG_EXT_INT_MASK); 1370 val &= ~(MVPP22_XLG_EXT_INT_MASK_XLG | 1371 MVPP22_XLG_EXT_INT_MASK_GIG); 1372 writel(val, port->base + MVPP22_XLG_EXT_INT_MASK); 1373 } 1374 1375 if (phy_interface_mode_is_rgmii(port->phy_interface) || 1376 phy_interface_mode_is_8023z(port->phy_interface) || 1377 port->phy_interface == PHY_INTERFACE_MODE_SGMII) { 1378 val = readl(port->base + MVPP22_GMAC_INT_SUM_MASK); 1379 val &= ~MVPP22_GMAC_INT_SUM_MASK_LINK_STAT; 1380 writel(val, port->base + MVPP22_GMAC_INT_SUM_MASK); 1381 } 1382 } 1383 1384 static void mvpp22_gop_setup_irq(struct mvpp2_port *port) 1385 { 1386 u32 val; 1387 1388 if (port->phylink || 1389 phy_interface_mode_is_rgmii(port->phy_interface) || 1390 phy_interface_mode_is_8023z(port->phy_interface) || 1391 port->phy_interface == PHY_INTERFACE_MODE_SGMII) { 1392 val = readl(port->base + MVPP22_GMAC_INT_MASK); 1393 val |= MVPP22_GMAC_INT_MASK_LINK_STAT; 1394 writel(val, port->base + MVPP22_GMAC_INT_MASK); 1395 } 1396 1397 if (mvpp2_port_supports_xlg(port)) { 1398 val = readl(port->base + MVPP22_XLG_INT_MASK); 1399 val |= MVPP22_XLG_INT_MASK_LINK; 1400 writel(val, port->base + MVPP22_XLG_INT_MASK); 1401 } 1402 1403 mvpp22_gop_unmask_irq(port); 1404 } 1405 1406 /* Sets the PHY mode of the COMPHY (which configures the serdes lanes). 1407 * 1408 * The PHY mode used by the PPv2 driver comes from the network subsystem, while 1409 * the one given to the COMPHY comes from the generic PHY subsystem. Hence they 1410 * differ. 1411 * 1412 * The COMPHY configures the serdes lanes regardless of the actual use of the 1413 * lanes by the physical layer. This is why configurations like 1414 * "PPv2 (2500BaseX) - COMPHY (2500SGMII)" are valid. 1415 */ 1416 static int mvpp22_comphy_init(struct mvpp2_port *port) 1417 { 1418 int ret; 1419 1420 if (!port->comphy) 1421 return 0; 1422 1423 ret = phy_set_mode_ext(port->comphy, PHY_MODE_ETHERNET, 1424 port->phy_interface); 1425 if (ret) 1426 return ret; 1427 1428 return phy_power_on(port->comphy); 1429 } 1430 1431 static void mvpp2_port_enable(struct mvpp2_port *port) 1432 { 1433 u32 val; 1434 1435 if (mvpp2_port_supports_xlg(port) && 1436 mvpp2_is_xlg(port->phy_interface)) { 1437 val = readl(port->base + MVPP22_XLG_CTRL0_REG); 1438 val |= MVPP22_XLG_CTRL0_PORT_EN; 1439 val &= ~MVPP22_XLG_CTRL0_MIB_CNT_DIS; 1440 writel(val, port->base + MVPP22_XLG_CTRL0_REG); 1441 } else { 1442 val = readl(port->base + MVPP2_GMAC_CTRL_0_REG); 1443 val |= MVPP2_GMAC_PORT_EN_MASK; 1444 val |= MVPP2_GMAC_MIB_CNTR_EN_MASK; 1445 writel(val, port->base + MVPP2_GMAC_CTRL_0_REG); 1446 } 1447 } 1448 1449 static void mvpp2_port_disable(struct mvpp2_port *port) 1450 { 1451 u32 val; 1452 1453 if (mvpp2_port_supports_xlg(port) && 1454 mvpp2_is_xlg(port->phy_interface)) { 1455 val = readl(port->base + MVPP22_XLG_CTRL0_REG); 1456 val &= ~MVPP22_XLG_CTRL0_PORT_EN; 1457 writel(val, port->base + MVPP22_XLG_CTRL0_REG); 1458 } 1459 1460 val = readl(port->base + MVPP2_GMAC_CTRL_0_REG); 1461 val &= ~(MVPP2_GMAC_PORT_EN_MASK); 1462 writel(val, port->base + MVPP2_GMAC_CTRL_0_REG); 1463 } 1464 1465 /* Set IEEE 802.3x Flow Control Xon Packet Transmission Mode */ 1466 static void mvpp2_port_periodic_xon_disable(struct mvpp2_port *port) 1467 { 1468 u32 val; 1469 1470 val = readl(port->base + MVPP2_GMAC_CTRL_1_REG) & 1471 ~MVPP2_GMAC_PERIODIC_XON_EN_MASK; 1472 writel(val, port->base + MVPP2_GMAC_CTRL_1_REG); 1473 } 1474 1475 /* Configure loopback port */ 1476 static void mvpp2_port_loopback_set(struct mvpp2_port *port, 1477 const struct phylink_link_state *state) 1478 { 1479 u32 val; 1480 1481 val = readl(port->base + MVPP2_GMAC_CTRL_1_REG); 1482 1483 if (state->speed == 1000) 1484 val |= MVPP2_GMAC_GMII_LB_EN_MASK; 1485 else 1486 val &= ~MVPP2_GMAC_GMII_LB_EN_MASK; 1487 1488 if (phy_interface_mode_is_8023z(port->phy_interface) || 1489 port->phy_interface == PHY_INTERFACE_MODE_SGMII) 1490 val |= MVPP2_GMAC_PCS_LB_EN_MASK; 1491 else 1492 val &= ~MVPP2_GMAC_PCS_LB_EN_MASK; 1493 1494 writel(val, port->base + MVPP2_GMAC_CTRL_1_REG); 1495 } 1496 1497 enum { 1498 ETHTOOL_XDP_REDIRECT, 1499 ETHTOOL_XDP_PASS, 1500 ETHTOOL_XDP_DROP, 1501 ETHTOOL_XDP_TX, 1502 ETHTOOL_XDP_TX_ERR, 1503 ETHTOOL_XDP_XMIT, 1504 ETHTOOL_XDP_XMIT_ERR, 1505 }; 1506 1507 struct mvpp2_ethtool_counter { 1508 unsigned int offset; 1509 const char string[ETH_GSTRING_LEN]; 1510 bool reg_is_64b; 1511 }; 1512 1513 static u64 mvpp2_read_count(struct mvpp2_port *port, 1514 const struct mvpp2_ethtool_counter *counter) 1515 { 1516 u64 val; 1517 1518 val = readl(port->stats_base + counter->offset); 1519 if (counter->reg_is_64b) 1520 val += (u64)readl(port->stats_base + counter->offset + 4) << 32; 1521 1522 return val; 1523 } 1524 1525 /* Some counters are accessed indirectly by first writing an index to 1526 * MVPP2_CTRS_IDX. The index can represent various resources depending on the 1527 * register we access, it can be a hit counter for some classification tables, 1528 * a counter specific to a rxq, a txq or a buffer pool. 1529 */ 1530 static u32 mvpp2_read_index(struct mvpp2 *priv, u32 index, u32 reg) 1531 { 1532 mvpp2_write(priv, MVPP2_CTRS_IDX, index); 1533 return mvpp2_read(priv, reg); 1534 } 1535 1536 /* Due to the fact that software statistics and hardware statistics are, by 1537 * design, incremented at different moments in the chain of packet processing, 1538 * it is very likely that incoming packets could have been dropped after being 1539 * counted by hardware but before reaching software statistics (most probably 1540 * multicast packets), and in the oppposite way, during transmission, FCS bytes 1541 * are added in between as well as TSO skb will be split and header bytes added. 1542 * Hence, statistics gathered from userspace with ifconfig (software) and 1543 * ethtool (hardware) cannot be compared. 1544 */ 1545 static const struct mvpp2_ethtool_counter mvpp2_ethtool_mib_regs[] = { 1546 { MVPP2_MIB_GOOD_OCTETS_RCVD, "good_octets_received", true }, 1547 { MVPP2_MIB_BAD_OCTETS_RCVD, "bad_octets_received" }, 1548 { MVPP2_MIB_CRC_ERRORS_SENT, "crc_errors_sent" }, 1549 { MVPP2_MIB_UNICAST_FRAMES_RCVD, "unicast_frames_received" }, 1550 { MVPP2_MIB_BROADCAST_FRAMES_RCVD, "broadcast_frames_received" }, 1551 { MVPP2_MIB_MULTICAST_FRAMES_RCVD, "multicast_frames_received" }, 1552 { MVPP2_MIB_FRAMES_64_OCTETS, "frames_64_octets" }, 1553 { MVPP2_MIB_FRAMES_65_TO_127_OCTETS, "frames_65_to_127_octet" }, 1554 { MVPP2_MIB_FRAMES_128_TO_255_OCTETS, "frames_128_to_255_octet" }, 1555 { MVPP2_MIB_FRAMES_256_TO_511_OCTETS, "frames_256_to_511_octet" }, 1556 { MVPP2_MIB_FRAMES_512_TO_1023_OCTETS, "frames_512_to_1023_octet" }, 1557 { MVPP2_MIB_FRAMES_1024_TO_MAX_OCTETS, "frames_1024_to_max_octet" }, 1558 { MVPP2_MIB_GOOD_OCTETS_SENT, "good_octets_sent", true }, 1559 { MVPP2_MIB_UNICAST_FRAMES_SENT, "unicast_frames_sent" }, 1560 { MVPP2_MIB_MULTICAST_FRAMES_SENT, "multicast_frames_sent" }, 1561 { MVPP2_MIB_BROADCAST_FRAMES_SENT, "broadcast_frames_sent" }, 1562 { MVPP2_MIB_FC_SENT, "fc_sent" }, 1563 { MVPP2_MIB_FC_RCVD, "fc_received" }, 1564 { MVPP2_MIB_RX_FIFO_OVERRUN, "rx_fifo_overrun" }, 1565 { MVPP2_MIB_UNDERSIZE_RCVD, "undersize_received" }, 1566 { MVPP2_MIB_FRAGMENTS_RCVD, "fragments_received" }, 1567 { MVPP2_MIB_OVERSIZE_RCVD, "oversize_received" }, 1568 { MVPP2_MIB_JABBER_RCVD, "jabber_received" }, 1569 { MVPP2_MIB_MAC_RCV_ERROR, "mac_receive_error" }, 1570 { MVPP2_MIB_BAD_CRC_EVENT, "bad_crc_event" }, 1571 { MVPP2_MIB_COLLISION, "collision" }, 1572 { MVPP2_MIB_LATE_COLLISION, "late_collision" }, 1573 }; 1574 1575 static const struct mvpp2_ethtool_counter mvpp2_ethtool_port_regs[] = { 1576 { MVPP2_OVERRUN_ETH_DROP, "rx_fifo_or_parser_overrun_drops" }, 1577 { MVPP2_CLS_ETH_DROP, "rx_classifier_drops" }, 1578 }; 1579 1580 static const struct mvpp2_ethtool_counter mvpp2_ethtool_txq_regs[] = { 1581 { MVPP2_TX_DESC_ENQ_CTR, "txq_%d_desc_enqueue" }, 1582 { MVPP2_TX_DESC_ENQ_TO_DDR_CTR, "txq_%d_desc_enqueue_to_ddr" }, 1583 { MVPP2_TX_BUFF_ENQ_TO_DDR_CTR, "txq_%d_buff_euqueue_to_ddr" }, 1584 { MVPP2_TX_DESC_ENQ_HW_FWD_CTR, "txq_%d_desc_hardware_forwarded" }, 1585 { MVPP2_TX_PKTS_DEQ_CTR, "txq_%d_packets_dequeued" }, 1586 { MVPP2_TX_PKTS_FULL_QUEUE_DROP_CTR, "txq_%d_queue_full_drops" }, 1587 { MVPP2_TX_PKTS_EARLY_DROP_CTR, "txq_%d_packets_early_drops" }, 1588 { MVPP2_TX_PKTS_BM_DROP_CTR, "txq_%d_packets_bm_drops" }, 1589 { MVPP2_TX_PKTS_BM_MC_DROP_CTR, "txq_%d_packets_rep_bm_drops" }, 1590 }; 1591 1592 static const struct mvpp2_ethtool_counter mvpp2_ethtool_rxq_regs[] = { 1593 { MVPP2_RX_DESC_ENQ_CTR, "rxq_%d_desc_enqueue" }, 1594 { MVPP2_RX_PKTS_FULL_QUEUE_DROP_CTR, "rxq_%d_queue_full_drops" }, 1595 { MVPP2_RX_PKTS_EARLY_DROP_CTR, "rxq_%d_packets_early_drops" }, 1596 { MVPP2_RX_PKTS_BM_DROP_CTR, "rxq_%d_packets_bm_drops" }, 1597 }; 1598 1599 static const struct mvpp2_ethtool_counter mvpp2_ethtool_xdp[] = { 1600 { ETHTOOL_XDP_REDIRECT, "rx_xdp_redirect", }, 1601 { ETHTOOL_XDP_PASS, "rx_xdp_pass", }, 1602 { ETHTOOL_XDP_DROP, "rx_xdp_drop", }, 1603 { ETHTOOL_XDP_TX, "rx_xdp_tx", }, 1604 { ETHTOOL_XDP_TX_ERR, "rx_xdp_tx_errors", }, 1605 { ETHTOOL_XDP_XMIT, "tx_xdp_xmit", }, 1606 { ETHTOOL_XDP_XMIT_ERR, "tx_xdp_xmit_errors", }, 1607 }; 1608 1609 #define MVPP2_N_ETHTOOL_STATS(ntxqs, nrxqs) (ARRAY_SIZE(mvpp2_ethtool_mib_regs) + \ 1610 ARRAY_SIZE(mvpp2_ethtool_port_regs) + \ 1611 (ARRAY_SIZE(mvpp2_ethtool_txq_regs) * (ntxqs)) + \ 1612 (ARRAY_SIZE(mvpp2_ethtool_rxq_regs) * (nrxqs)) + \ 1613 ARRAY_SIZE(mvpp2_ethtool_xdp)) 1614 1615 static void mvpp2_ethtool_get_strings(struct net_device *netdev, u32 sset, 1616 u8 *data) 1617 { 1618 struct mvpp2_port *port = netdev_priv(netdev); 1619 int i, q; 1620 1621 if (sset != ETH_SS_STATS) 1622 return; 1623 1624 for (i = 0; i < ARRAY_SIZE(mvpp2_ethtool_mib_regs); i++) { 1625 strscpy(data, mvpp2_ethtool_mib_regs[i].string, 1626 ETH_GSTRING_LEN); 1627 data += ETH_GSTRING_LEN; 1628 } 1629 1630 for (i = 0; i < ARRAY_SIZE(mvpp2_ethtool_port_regs); i++) { 1631 strscpy(data, mvpp2_ethtool_port_regs[i].string, 1632 ETH_GSTRING_LEN); 1633 data += ETH_GSTRING_LEN; 1634 } 1635 1636 for (q = 0; q < port->ntxqs; q++) { 1637 for (i = 0; i < ARRAY_SIZE(mvpp2_ethtool_txq_regs); i++) { 1638 snprintf(data, ETH_GSTRING_LEN, 1639 mvpp2_ethtool_txq_regs[i].string, q); 1640 data += ETH_GSTRING_LEN; 1641 } 1642 } 1643 1644 for (q = 0; q < port->nrxqs; q++) { 1645 for (i = 0; i < ARRAY_SIZE(mvpp2_ethtool_rxq_regs); i++) { 1646 snprintf(data, ETH_GSTRING_LEN, 1647 mvpp2_ethtool_rxq_regs[i].string, 1648 q); 1649 data += ETH_GSTRING_LEN; 1650 } 1651 } 1652 1653 for (i = 0; i < ARRAY_SIZE(mvpp2_ethtool_xdp); i++) { 1654 strscpy(data, mvpp2_ethtool_xdp[i].string, 1655 ETH_GSTRING_LEN); 1656 data += ETH_GSTRING_LEN; 1657 } 1658 } 1659 1660 static void 1661 mvpp2_get_xdp_stats(struct mvpp2_port *port, struct mvpp2_pcpu_stats *xdp_stats) 1662 { 1663 unsigned int start; 1664 unsigned int cpu; 1665 1666 /* Gather XDP Statistics */ 1667 for_each_possible_cpu(cpu) { 1668 struct mvpp2_pcpu_stats *cpu_stats; 1669 u64 xdp_redirect; 1670 u64 xdp_pass; 1671 u64 xdp_drop; 1672 u64 xdp_xmit; 1673 u64 xdp_xmit_err; 1674 u64 xdp_tx; 1675 u64 xdp_tx_err; 1676 1677 cpu_stats = per_cpu_ptr(port->stats, cpu); 1678 do { 1679 start = u64_stats_fetch_begin_irq(&cpu_stats->syncp); 1680 xdp_redirect = cpu_stats->xdp_redirect; 1681 xdp_pass = cpu_stats->xdp_pass; 1682 xdp_drop = cpu_stats->xdp_drop; 1683 xdp_xmit = cpu_stats->xdp_xmit; 1684 xdp_xmit_err = cpu_stats->xdp_xmit_err; 1685 xdp_tx = cpu_stats->xdp_tx; 1686 xdp_tx_err = cpu_stats->xdp_tx_err; 1687 } while (u64_stats_fetch_retry_irq(&cpu_stats->syncp, start)); 1688 1689 xdp_stats->xdp_redirect += xdp_redirect; 1690 xdp_stats->xdp_pass += xdp_pass; 1691 xdp_stats->xdp_drop += xdp_drop; 1692 xdp_stats->xdp_xmit += xdp_xmit; 1693 xdp_stats->xdp_xmit_err += xdp_xmit_err; 1694 xdp_stats->xdp_tx += xdp_tx; 1695 xdp_stats->xdp_tx_err += xdp_tx_err; 1696 } 1697 } 1698 1699 static void mvpp2_read_stats(struct mvpp2_port *port) 1700 { 1701 struct mvpp2_pcpu_stats xdp_stats = {}; 1702 const struct mvpp2_ethtool_counter *s; 1703 u64 *pstats; 1704 int i, q; 1705 1706 pstats = port->ethtool_stats; 1707 1708 for (i = 0; i < ARRAY_SIZE(mvpp2_ethtool_mib_regs); i++) 1709 *pstats++ += mvpp2_read_count(port, &mvpp2_ethtool_mib_regs[i]); 1710 1711 for (i = 0; i < ARRAY_SIZE(mvpp2_ethtool_port_regs); i++) 1712 *pstats++ += mvpp2_read(port->priv, 1713 mvpp2_ethtool_port_regs[i].offset + 1714 4 * port->id); 1715 1716 for (q = 0; q < port->ntxqs; q++) 1717 for (i = 0; i < ARRAY_SIZE(mvpp2_ethtool_txq_regs); i++) 1718 *pstats++ += mvpp2_read_index(port->priv, 1719 MVPP22_CTRS_TX_CTR(port->id, q), 1720 mvpp2_ethtool_txq_regs[i].offset); 1721 1722 /* Rxqs are numbered from 0 from the user standpoint, but not from the 1723 * driver's. We need to add the port->first_rxq offset. 1724 */ 1725 for (q = 0; q < port->nrxqs; q++) 1726 for (i = 0; i < ARRAY_SIZE(mvpp2_ethtool_rxq_regs); i++) 1727 *pstats++ += mvpp2_read_index(port->priv, 1728 port->first_rxq + q, 1729 mvpp2_ethtool_rxq_regs[i].offset); 1730 1731 /* Gather XDP Statistics */ 1732 mvpp2_get_xdp_stats(port, &xdp_stats); 1733 1734 for (i = 0, s = mvpp2_ethtool_xdp; 1735 s < mvpp2_ethtool_xdp + ARRAY_SIZE(mvpp2_ethtool_xdp); 1736 s++, i++) { 1737 switch (s->offset) { 1738 case ETHTOOL_XDP_REDIRECT: 1739 *pstats++ = xdp_stats.xdp_redirect; 1740 break; 1741 case ETHTOOL_XDP_PASS: 1742 *pstats++ = xdp_stats.xdp_pass; 1743 break; 1744 case ETHTOOL_XDP_DROP: 1745 *pstats++ = xdp_stats.xdp_drop; 1746 break; 1747 case ETHTOOL_XDP_TX: 1748 *pstats++ = xdp_stats.xdp_tx; 1749 break; 1750 case ETHTOOL_XDP_TX_ERR: 1751 *pstats++ = xdp_stats.xdp_tx_err; 1752 break; 1753 case ETHTOOL_XDP_XMIT: 1754 *pstats++ = xdp_stats.xdp_xmit; 1755 break; 1756 case ETHTOOL_XDP_XMIT_ERR: 1757 *pstats++ = xdp_stats.xdp_xmit_err; 1758 break; 1759 } 1760 } 1761 } 1762 1763 static void mvpp2_gather_hw_statistics(struct work_struct *work) 1764 { 1765 struct delayed_work *del_work = to_delayed_work(work); 1766 struct mvpp2_port *port = container_of(del_work, struct mvpp2_port, 1767 stats_work); 1768 1769 mutex_lock(&port->gather_stats_lock); 1770 1771 mvpp2_read_stats(port); 1772 1773 /* No need to read again the counters right after this function if it 1774 * was called asynchronously by the user (ie. use of ethtool). 1775 */ 1776 cancel_delayed_work(&port->stats_work); 1777 queue_delayed_work(port->priv->stats_queue, &port->stats_work, 1778 MVPP2_MIB_COUNTERS_STATS_DELAY); 1779 1780 mutex_unlock(&port->gather_stats_lock); 1781 } 1782 1783 static void mvpp2_ethtool_get_stats(struct net_device *dev, 1784 struct ethtool_stats *stats, u64 *data) 1785 { 1786 struct mvpp2_port *port = netdev_priv(dev); 1787 1788 /* Update statistics for the given port, then take the lock to avoid 1789 * concurrent accesses on the ethtool_stats structure during its copy. 1790 */ 1791 mvpp2_gather_hw_statistics(&port->stats_work.work); 1792 1793 mutex_lock(&port->gather_stats_lock); 1794 memcpy(data, port->ethtool_stats, 1795 sizeof(u64) * MVPP2_N_ETHTOOL_STATS(port->ntxqs, port->nrxqs)); 1796 mutex_unlock(&port->gather_stats_lock); 1797 } 1798 1799 static int mvpp2_ethtool_get_sset_count(struct net_device *dev, int sset) 1800 { 1801 struct mvpp2_port *port = netdev_priv(dev); 1802 1803 if (sset == ETH_SS_STATS) 1804 return MVPP2_N_ETHTOOL_STATS(port->ntxqs, port->nrxqs); 1805 1806 return -EOPNOTSUPP; 1807 } 1808 1809 static void mvpp2_mac_reset_assert(struct mvpp2_port *port) 1810 { 1811 u32 val; 1812 1813 val = readl(port->base + MVPP2_GMAC_CTRL_2_REG) | 1814 MVPP2_GMAC_PORT_RESET_MASK; 1815 writel(val, port->base + MVPP2_GMAC_CTRL_2_REG); 1816 1817 if (port->priv->hw_version == MVPP22 && port->gop_id == 0) { 1818 val = readl(port->base + MVPP22_XLG_CTRL0_REG) & 1819 ~MVPP22_XLG_CTRL0_MAC_RESET_DIS; 1820 writel(val, port->base + MVPP22_XLG_CTRL0_REG); 1821 } 1822 } 1823 1824 static void mvpp22_pcs_reset_assert(struct mvpp2_port *port) 1825 { 1826 struct mvpp2 *priv = port->priv; 1827 void __iomem *mpcs, *xpcs; 1828 u32 val; 1829 1830 if (port->priv->hw_version != MVPP22 || port->gop_id != 0) 1831 return; 1832 1833 mpcs = priv->iface_base + MVPP22_MPCS_BASE(port->gop_id); 1834 xpcs = priv->iface_base + MVPP22_XPCS_BASE(port->gop_id); 1835 1836 val = readl(mpcs + MVPP22_MPCS_CLK_RESET); 1837 val &= ~(MAC_CLK_RESET_MAC | MAC_CLK_RESET_SD_RX | MAC_CLK_RESET_SD_TX); 1838 val |= MVPP22_MPCS_CLK_RESET_DIV_SET; 1839 writel(val, mpcs + MVPP22_MPCS_CLK_RESET); 1840 1841 val = readl(xpcs + MVPP22_XPCS_CFG0); 1842 writel(val & ~MVPP22_XPCS_CFG0_RESET_DIS, xpcs + MVPP22_XPCS_CFG0); 1843 } 1844 1845 static void mvpp22_pcs_reset_deassert(struct mvpp2_port *port) 1846 { 1847 struct mvpp2 *priv = port->priv; 1848 void __iomem *mpcs, *xpcs; 1849 u32 val; 1850 1851 if (port->priv->hw_version != MVPP22 || port->gop_id != 0) 1852 return; 1853 1854 mpcs = priv->iface_base + MVPP22_MPCS_BASE(port->gop_id); 1855 xpcs = priv->iface_base + MVPP22_XPCS_BASE(port->gop_id); 1856 1857 switch (port->phy_interface) { 1858 case PHY_INTERFACE_MODE_10GBASER: 1859 val = readl(mpcs + MVPP22_MPCS_CLK_RESET); 1860 val |= MAC_CLK_RESET_MAC | MAC_CLK_RESET_SD_RX | 1861 MAC_CLK_RESET_SD_TX; 1862 val &= ~MVPP22_MPCS_CLK_RESET_DIV_SET; 1863 writel(val, mpcs + MVPP22_MPCS_CLK_RESET); 1864 break; 1865 case PHY_INTERFACE_MODE_XAUI: 1866 case PHY_INTERFACE_MODE_RXAUI: 1867 val = readl(xpcs + MVPP22_XPCS_CFG0); 1868 writel(val | MVPP22_XPCS_CFG0_RESET_DIS, xpcs + MVPP22_XPCS_CFG0); 1869 break; 1870 default: 1871 break; 1872 } 1873 } 1874 1875 /* Change maximum receive size of the port */ 1876 static inline void mvpp2_gmac_max_rx_size_set(struct mvpp2_port *port) 1877 { 1878 u32 val; 1879 1880 val = readl(port->base + MVPP2_GMAC_CTRL_0_REG); 1881 val &= ~MVPP2_GMAC_MAX_RX_SIZE_MASK; 1882 val |= (((port->pkt_size - MVPP2_MH_SIZE) / 2) << 1883 MVPP2_GMAC_MAX_RX_SIZE_OFFS); 1884 writel(val, port->base + MVPP2_GMAC_CTRL_0_REG); 1885 } 1886 1887 /* Change maximum receive size of the port */ 1888 static inline void mvpp2_xlg_max_rx_size_set(struct mvpp2_port *port) 1889 { 1890 u32 val; 1891 1892 val = readl(port->base + MVPP22_XLG_CTRL1_REG); 1893 val &= ~MVPP22_XLG_CTRL1_FRAMESIZELIMIT_MASK; 1894 val |= ((port->pkt_size - MVPP2_MH_SIZE) / 2) << 1895 MVPP22_XLG_CTRL1_FRAMESIZELIMIT_OFFS; 1896 writel(val, port->base + MVPP22_XLG_CTRL1_REG); 1897 } 1898 1899 /* Set defaults to the MVPP2 port */ 1900 static void mvpp2_defaults_set(struct mvpp2_port *port) 1901 { 1902 int tx_port_num, val, queue, lrxq; 1903 1904 if (port->priv->hw_version == MVPP21) { 1905 /* Update TX FIFO MIN Threshold */ 1906 val = readl(port->base + MVPP2_GMAC_PORT_FIFO_CFG_1_REG); 1907 val &= ~MVPP2_GMAC_TX_FIFO_MIN_TH_ALL_MASK; 1908 /* Min. TX threshold must be less than minimal packet length */ 1909 val |= MVPP2_GMAC_TX_FIFO_MIN_TH_MASK(64 - 4 - 2); 1910 writel(val, port->base + MVPP2_GMAC_PORT_FIFO_CFG_1_REG); 1911 } 1912 1913 /* Disable Legacy WRR, Disable EJP, Release from reset */ 1914 tx_port_num = mvpp2_egress_port(port); 1915 mvpp2_write(port->priv, MVPP2_TXP_SCHED_PORT_INDEX_REG, 1916 tx_port_num); 1917 mvpp2_write(port->priv, MVPP2_TXP_SCHED_CMD_1_REG, 0); 1918 1919 /* Set TXQ scheduling to Round-Robin */ 1920 mvpp2_write(port->priv, MVPP2_TXP_SCHED_FIXED_PRIO_REG, 0); 1921 1922 /* Close bandwidth for all queues */ 1923 for (queue = 0; queue < MVPP2_MAX_TXQ; queue++) 1924 mvpp2_write(port->priv, 1925 MVPP2_TXQ_SCHED_TOKEN_CNTR_REG(queue), 0); 1926 1927 /* Set refill period to 1 usec, refill tokens 1928 * and bucket size to maximum 1929 */ 1930 mvpp2_write(port->priv, MVPP2_TXP_SCHED_PERIOD_REG, 1931 port->priv->tclk / USEC_PER_SEC); 1932 val = mvpp2_read(port->priv, MVPP2_TXP_SCHED_REFILL_REG); 1933 val &= ~MVPP2_TXP_REFILL_PERIOD_ALL_MASK; 1934 val |= MVPP2_TXP_REFILL_PERIOD_MASK(1); 1935 val |= MVPP2_TXP_REFILL_TOKENS_ALL_MASK; 1936 mvpp2_write(port->priv, MVPP2_TXP_SCHED_REFILL_REG, val); 1937 val = MVPP2_TXP_TOKEN_SIZE_MAX; 1938 mvpp2_write(port->priv, MVPP2_TXP_SCHED_TOKEN_SIZE_REG, val); 1939 1940 /* Set MaximumLowLatencyPacketSize value to 256 */ 1941 mvpp2_write(port->priv, MVPP2_RX_CTRL_REG(port->id), 1942 MVPP2_RX_USE_PSEUDO_FOR_CSUM_MASK | 1943 MVPP2_RX_LOW_LATENCY_PKT_SIZE(256)); 1944 1945 /* Enable Rx cache snoop */ 1946 for (lrxq = 0; lrxq < port->nrxqs; lrxq++) { 1947 queue = port->rxqs[lrxq]->id; 1948 val = mvpp2_read(port->priv, MVPP2_RXQ_CONFIG_REG(queue)); 1949 val |= MVPP2_SNOOP_PKT_SIZE_MASK | 1950 MVPP2_SNOOP_BUF_HDR_MASK; 1951 mvpp2_write(port->priv, MVPP2_RXQ_CONFIG_REG(queue), val); 1952 } 1953 1954 /* At default, mask all interrupts to all present cpus */ 1955 mvpp2_interrupts_disable(port); 1956 } 1957 1958 /* Enable/disable receiving packets */ 1959 static void mvpp2_ingress_enable(struct mvpp2_port *port) 1960 { 1961 u32 val; 1962 int lrxq, queue; 1963 1964 for (lrxq = 0; lrxq < port->nrxqs; lrxq++) { 1965 queue = port->rxqs[lrxq]->id; 1966 val = mvpp2_read(port->priv, MVPP2_RXQ_CONFIG_REG(queue)); 1967 val &= ~MVPP2_RXQ_DISABLE_MASK; 1968 mvpp2_write(port->priv, MVPP2_RXQ_CONFIG_REG(queue), val); 1969 } 1970 } 1971 1972 static void mvpp2_ingress_disable(struct mvpp2_port *port) 1973 { 1974 u32 val; 1975 int lrxq, queue; 1976 1977 for (lrxq = 0; lrxq < port->nrxqs; lrxq++) { 1978 queue = port->rxqs[lrxq]->id; 1979 val = mvpp2_read(port->priv, MVPP2_RXQ_CONFIG_REG(queue)); 1980 val |= MVPP2_RXQ_DISABLE_MASK; 1981 mvpp2_write(port->priv, MVPP2_RXQ_CONFIG_REG(queue), val); 1982 } 1983 } 1984 1985 /* Enable transmit via physical egress queue 1986 * - HW starts take descriptors from DRAM 1987 */ 1988 static void mvpp2_egress_enable(struct mvpp2_port *port) 1989 { 1990 u32 qmap; 1991 int queue; 1992 int tx_port_num = mvpp2_egress_port(port); 1993 1994 /* Enable all initialized TXs. */ 1995 qmap = 0; 1996 for (queue = 0; queue < port->ntxqs; queue++) { 1997 struct mvpp2_tx_queue *txq = port->txqs[queue]; 1998 1999 if (txq->descs) 2000 qmap |= (1 << queue); 2001 } 2002 2003 mvpp2_write(port->priv, MVPP2_TXP_SCHED_PORT_INDEX_REG, tx_port_num); 2004 mvpp2_write(port->priv, MVPP2_TXP_SCHED_Q_CMD_REG, qmap); 2005 } 2006 2007 /* Disable transmit via physical egress queue 2008 * - HW doesn't take descriptors from DRAM 2009 */ 2010 static void mvpp2_egress_disable(struct mvpp2_port *port) 2011 { 2012 u32 reg_data; 2013 int delay; 2014 int tx_port_num = mvpp2_egress_port(port); 2015 2016 /* Issue stop command for active channels only */ 2017 mvpp2_write(port->priv, MVPP2_TXP_SCHED_PORT_INDEX_REG, tx_port_num); 2018 reg_data = (mvpp2_read(port->priv, MVPP2_TXP_SCHED_Q_CMD_REG)) & 2019 MVPP2_TXP_SCHED_ENQ_MASK; 2020 if (reg_data != 0) 2021 mvpp2_write(port->priv, MVPP2_TXP_SCHED_Q_CMD_REG, 2022 (reg_data << MVPP2_TXP_SCHED_DISQ_OFFSET)); 2023 2024 /* Wait for all Tx activity to terminate. */ 2025 delay = 0; 2026 do { 2027 if (delay >= MVPP2_TX_DISABLE_TIMEOUT_MSEC) { 2028 netdev_warn(port->dev, 2029 "Tx stop timed out, status=0x%08x\n", 2030 reg_data); 2031 break; 2032 } 2033 mdelay(1); 2034 delay++; 2035 2036 /* Check port TX Command register that all 2037 * Tx queues are stopped 2038 */ 2039 reg_data = mvpp2_read(port->priv, MVPP2_TXP_SCHED_Q_CMD_REG); 2040 } while (reg_data & MVPP2_TXP_SCHED_ENQ_MASK); 2041 } 2042 2043 /* Rx descriptors helper methods */ 2044 2045 /* Get number of Rx descriptors occupied by received packets */ 2046 static inline int 2047 mvpp2_rxq_received(struct mvpp2_port *port, int rxq_id) 2048 { 2049 u32 val = mvpp2_read(port->priv, MVPP2_RXQ_STATUS_REG(rxq_id)); 2050 2051 return val & MVPP2_RXQ_OCCUPIED_MASK; 2052 } 2053 2054 /* Update Rx queue status with the number of occupied and available 2055 * Rx descriptor slots. 2056 */ 2057 static inline void 2058 mvpp2_rxq_status_update(struct mvpp2_port *port, int rxq_id, 2059 int used_count, int free_count) 2060 { 2061 /* Decrement the number of used descriptors and increment count 2062 * increment the number of free descriptors. 2063 */ 2064 u32 val = used_count | (free_count << MVPP2_RXQ_NUM_NEW_OFFSET); 2065 2066 mvpp2_write(port->priv, MVPP2_RXQ_STATUS_UPDATE_REG(rxq_id), val); 2067 } 2068 2069 /* Get pointer to next RX descriptor to be processed by SW */ 2070 static inline struct mvpp2_rx_desc * 2071 mvpp2_rxq_next_desc_get(struct mvpp2_rx_queue *rxq) 2072 { 2073 int rx_desc = rxq->next_desc_to_proc; 2074 2075 rxq->next_desc_to_proc = MVPP2_QUEUE_NEXT_DESC(rxq, rx_desc); 2076 prefetch(rxq->descs + rxq->next_desc_to_proc); 2077 return rxq->descs + rx_desc; 2078 } 2079 2080 /* Set rx queue offset */ 2081 static void mvpp2_rxq_offset_set(struct mvpp2_port *port, 2082 int prxq, int offset) 2083 { 2084 u32 val; 2085 2086 /* Convert offset from bytes to units of 32 bytes */ 2087 offset = offset >> 5; 2088 2089 val = mvpp2_read(port->priv, MVPP2_RXQ_CONFIG_REG(prxq)); 2090 val &= ~MVPP2_RXQ_PACKET_OFFSET_MASK; 2091 2092 /* Offset is in */ 2093 val |= ((offset << MVPP2_RXQ_PACKET_OFFSET_OFFS) & 2094 MVPP2_RXQ_PACKET_OFFSET_MASK); 2095 2096 mvpp2_write(port->priv, MVPP2_RXQ_CONFIG_REG(prxq), val); 2097 } 2098 2099 /* Tx descriptors helper methods */ 2100 2101 /* Get pointer to next Tx descriptor to be processed (send) by HW */ 2102 static struct mvpp2_tx_desc * 2103 mvpp2_txq_next_desc_get(struct mvpp2_tx_queue *txq) 2104 { 2105 int tx_desc = txq->next_desc_to_proc; 2106 2107 txq->next_desc_to_proc = MVPP2_QUEUE_NEXT_DESC(txq, tx_desc); 2108 return txq->descs + tx_desc; 2109 } 2110 2111 /* Update HW with number of aggregated Tx descriptors to be sent 2112 * 2113 * Called only from mvpp2_tx(), so migration is disabled, using 2114 * smp_processor_id() is OK. 2115 */ 2116 static void mvpp2_aggr_txq_pend_desc_add(struct mvpp2_port *port, int pending) 2117 { 2118 /* aggregated access - relevant TXQ number is written in TX desc */ 2119 mvpp2_thread_write(port->priv, 2120 mvpp2_cpu_to_thread(port->priv, smp_processor_id()), 2121 MVPP2_AGGR_TXQ_UPDATE_REG, pending); 2122 } 2123 2124 /* Check if there are enough free descriptors in aggregated txq. 2125 * If not, update the number of occupied descriptors and repeat the check. 2126 * 2127 * Called only from mvpp2_tx(), so migration is disabled, using 2128 * smp_processor_id() is OK. 2129 */ 2130 static int mvpp2_aggr_desc_num_check(struct mvpp2_port *port, 2131 struct mvpp2_tx_queue *aggr_txq, int num) 2132 { 2133 if ((aggr_txq->count + num) > MVPP2_AGGR_TXQ_SIZE) { 2134 /* Update number of occupied aggregated Tx descriptors */ 2135 unsigned int thread = 2136 mvpp2_cpu_to_thread(port->priv, smp_processor_id()); 2137 u32 val = mvpp2_read_relaxed(port->priv, 2138 MVPP2_AGGR_TXQ_STATUS_REG(thread)); 2139 2140 aggr_txq->count = val & MVPP2_AGGR_TXQ_PENDING_MASK; 2141 2142 if ((aggr_txq->count + num) > MVPP2_AGGR_TXQ_SIZE) 2143 return -ENOMEM; 2144 } 2145 return 0; 2146 } 2147 2148 /* Reserved Tx descriptors allocation request 2149 * 2150 * Called only from mvpp2_txq_reserved_desc_num_proc(), itself called 2151 * only by mvpp2_tx(), so migration is disabled, using 2152 * smp_processor_id() is OK. 2153 */ 2154 static int mvpp2_txq_alloc_reserved_desc(struct mvpp2_port *port, 2155 struct mvpp2_tx_queue *txq, int num) 2156 { 2157 unsigned int thread = mvpp2_cpu_to_thread(port->priv, smp_processor_id()); 2158 struct mvpp2 *priv = port->priv; 2159 u32 val; 2160 2161 val = (txq->id << MVPP2_TXQ_RSVD_REQ_Q_OFFSET) | num; 2162 mvpp2_thread_write_relaxed(priv, thread, MVPP2_TXQ_RSVD_REQ_REG, val); 2163 2164 val = mvpp2_thread_read_relaxed(priv, thread, MVPP2_TXQ_RSVD_RSLT_REG); 2165 2166 return val & MVPP2_TXQ_RSVD_RSLT_MASK; 2167 } 2168 2169 /* Check if there are enough reserved descriptors for transmission. 2170 * If not, request chunk of reserved descriptors and check again. 2171 */ 2172 static int mvpp2_txq_reserved_desc_num_proc(struct mvpp2_port *port, 2173 struct mvpp2_tx_queue *txq, 2174 struct mvpp2_txq_pcpu *txq_pcpu, 2175 int num) 2176 { 2177 int req, desc_count; 2178 unsigned int thread; 2179 2180 if (txq_pcpu->reserved_num >= num) 2181 return 0; 2182 2183 /* Not enough descriptors reserved! Update the reserved descriptor 2184 * count and check again. 2185 */ 2186 2187 desc_count = 0; 2188 /* Compute total of used descriptors */ 2189 for (thread = 0; thread < port->priv->nthreads; thread++) { 2190 struct mvpp2_txq_pcpu *txq_pcpu_aux; 2191 2192 txq_pcpu_aux = per_cpu_ptr(txq->pcpu, thread); 2193 desc_count += txq_pcpu_aux->count; 2194 desc_count += txq_pcpu_aux->reserved_num; 2195 } 2196 2197 req = max(MVPP2_CPU_DESC_CHUNK, num - txq_pcpu->reserved_num); 2198 desc_count += req; 2199 2200 if (desc_count > 2201 (txq->size - (MVPP2_MAX_THREADS * MVPP2_CPU_DESC_CHUNK))) 2202 return -ENOMEM; 2203 2204 txq_pcpu->reserved_num += mvpp2_txq_alloc_reserved_desc(port, txq, req); 2205 2206 /* OK, the descriptor could have been updated: check again. */ 2207 if (txq_pcpu->reserved_num < num) 2208 return -ENOMEM; 2209 return 0; 2210 } 2211 2212 /* Release the last allocated Tx descriptor. Useful to handle DMA 2213 * mapping failures in the Tx path. 2214 */ 2215 static void mvpp2_txq_desc_put(struct mvpp2_tx_queue *txq) 2216 { 2217 if (txq->next_desc_to_proc == 0) 2218 txq->next_desc_to_proc = txq->last_desc - 1; 2219 else 2220 txq->next_desc_to_proc--; 2221 } 2222 2223 /* Set Tx descriptors fields relevant for CSUM calculation */ 2224 static u32 mvpp2_txq_desc_csum(int l3_offs, __be16 l3_proto, 2225 int ip_hdr_len, int l4_proto) 2226 { 2227 u32 command; 2228 2229 /* fields: L3_offset, IP_hdrlen, L3_type, G_IPv4_chk, 2230 * G_L4_chk, L4_type required only for checksum calculation 2231 */ 2232 command = (l3_offs << MVPP2_TXD_L3_OFF_SHIFT); 2233 command |= (ip_hdr_len << MVPP2_TXD_IP_HLEN_SHIFT); 2234 command |= MVPP2_TXD_IP_CSUM_DISABLE; 2235 2236 if (l3_proto == htons(ETH_P_IP)) { 2237 command &= ~MVPP2_TXD_IP_CSUM_DISABLE; /* enable IPv4 csum */ 2238 command &= ~MVPP2_TXD_L3_IP6; /* enable IPv4 */ 2239 } else { 2240 command |= MVPP2_TXD_L3_IP6; /* enable IPv6 */ 2241 } 2242 2243 if (l4_proto == IPPROTO_TCP) { 2244 command &= ~MVPP2_TXD_L4_UDP; /* enable TCP */ 2245 command &= ~MVPP2_TXD_L4_CSUM_FRAG; /* generate L4 csum */ 2246 } else if (l4_proto == IPPROTO_UDP) { 2247 command |= MVPP2_TXD_L4_UDP; /* enable UDP */ 2248 command &= ~MVPP2_TXD_L4_CSUM_FRAG; /* generate L4 csum */ 2249 } else { 2250 command |= MVPP2_TXD_L4_CSUM_NOT; 2251 } 2252 2253 return command; 2254 } 2255 2256 /* Get number of sent descriptors and decrement counter. 2257 * The number of sent descriptors is returned. 2258 * Per-thread access 2259 * 2260 * Called only from mvpp2_txq_done(), called from mvpp2_tx() 2261 * (migration disabled) and from the TX completion tasklet (migration 2262 * disabled) so using smp_processor_id() is OK. 2263 */ 2264 static inline int mvpp2_txq_sent_desc_proc(struct mvpp2_port *port, 2265 struct mvpp2_tx_queue *txq) 2266 { 2267 u32 val; 2268 2269 /* Reading status reg resets transmitted descriptor counter */ 2270 val = mvpp2_thread_read_relaxed(port->priv, 2271 mvpp2_cpu_to_thread(port->priv, smp_processor_id()), 2272 MVPP2_TXQ_SENT_REG(txq->id)); 2273 2274 return (val & MVPP2_TRANSMITTED_COUNT_MASK) >> 2275 MVPP2_TRANSMITTED_COUNT_OFFSET; 2276 } 2277 2278 /* Called through on_each_cpu(), so runs on all CPUs, with migration 2279 * disabled, therefore using smp_processor_id() is OK. 2280 */ 2281 static void mvpp2_txq_sent_counter_clear(void *arg) 2282 { 2283 struct mvpp2_port *port = arg; 2284 int queue; 2285 2286 /* If the thread isn't used, don't do anything */ 2287 if (smp_processor_id() > port->priv->nthreads) 2288 return; 2289 2290 for (queue = 0; queue < port->ntxqs; queue++) { 2291 int id = port->txqs[queue]->id; 2292 2293 mvpp2_thread_read(port->priv, 2294 mvpp2_cpu_to_thread(port->priv, smp_processor_id()), 2295 MVPP2_TXQ_SENT_REG(id)); 2296 } 2297 } 2298 2299 /* Set max sizes for Tx queues */ 2300 static void mvpp2_txp_max_tx_size_set(struct mvpp2_port *port) 2301 { 2302 u32 val, size, mtu; 2303 int txq, tx_port_num; 2304 2305 mtu = port->pkt_size * 8; 2306 if (mtu > MVPP2_TXP_MTU_MAX) 2307 mtu = MVPP2_TXP_MTU_MAX; 2308 2309 /* WA for wrong Token bucket update: Set MTU value = 3*real MTU value */ 2310 mtu = 3 * mtu; 2311 2312 /* Indirect access to registers */ 2313 tx_port_num = mvpp2_egress_port(port); 2314 mvpp2_write(port->priv, MVPP2_TXP_SCHED_PORT_INDEX_REG, tx_port_num); 2315 2316 /* Set MTU */ 2317 val = mvpp2_read(port->priv, MVPP2_TXP_SCHED_MTU_REG); 2318 val &= ~MVPP2_TXP_MTU_MAX; 2319 val |= mtu; 2320 mvpp2_write(port->priv, MVPP2_TXP_SCHED_MTU_REG, val); 2321 2322 /* TXP token size and all TXQs token size must be larger that MTU */ 2323 val = mvpp2_read(port->priv, MVPP2_TXP_SCHED_TOKEN_SIZE_REG); 2324 size = val & MVPP2_TXP_TOKEN_SIZE_MAX; 2325 if (size < mtu) { 2326 size = mtu; 2327 val &= ~MVPP2_TXP_TOKEN_SIZE_MAX; 2328 val |= size; 2329 mvpp2_write(port->priv, MVPP2_TXP_SCHED_TOKEN_SIZE_REG, val); 2330 } 2331 2332 for (txq = 0; txq < port->ntxqs; txq++) { 2333 val = mvpp2_read(port->priv, 2334 MVPP2_TXQ_SCHED_TOKEN_SIZE_REG(txq)); 2335 size = val & MVPP2_TXQ_TOKEN_SIZE_MAX; 2336 2337 if (size < mtu) { 2338 size = mtu; 2339 val &= ~MVPP2_TXQ_TOKEN_SIZE_MAX; 2340 val |= size; 2341 mvpp2_write(port->priv, 2342 MVPP2_TXQ_SCHED_TOKEN_SIZE_REG(txq), 2343 val); 2344 } 2345 } 2346 } 2347 2348 /* Set the number of packets that will be received before Rx interrupt 2349 * will be generated by HW. 2350 */ 2351 static void mvpp2_rx_pkts_coal_set(struct mvpp2_port *port, 2352 struct mvpp2_rx_queue *rxq) 2353 { 2354 unsigned int thread = mvpp2_cpu_to_thread(port->priv, get_cpu()); 2355 2356 if (rxq->pkts_coal > MVPP2_OCCUPIED_THRESH_MASK) 2357 rxq->pkts_coal = MVPP2_OCCUPIED_THRESH_MASK; 2358 2359 mvpp2_thread_write(port->priv, thread, MVPP2_RXQ_NUM_REG, rxq->id); 2360 mvpp2_thread_write(port->priv, thread, MVPP2_RXQ_THRESH_REG, 2361 rxq->pkts_coal); 2362 2363 put_cpu(); 2364 } 2365 2366 /* For some reason in the LSP this is done on each CPU. Why ? */ 2367 static void mvpp2_tx_pkts_coal_set(struct mvpp2_port *port, 2368 struct mvpp2_tx_queue *txq) 2369 { 2370 unsigned int thread = mvpp2_cpu_to_thread(port->priv, get_cpu()); 2371 u32 val; 2372 2373 if (txq->done_pkts_coal > MVPP2_TXQ_THRESH_MASK) 2374 txq->done_pkts_coal = MVPP2_TXQ_THRESH_MASK; 2375 2376 val = (txq->done_pkts_coal << MVPP2_TXQ_THRESH_OFFSET); 2377 mvpp2_thread_write(port->priv, thread, MVPP2_TXQ_NUM_REG, txq->id); 2378 mvpp2_thread_write(port->priv, thread, MVPP2_TXQ_THRESH_REG, val); 2379 2380 put_cpu(); 2381 } 2382 2383 static u32 mvpp2_usec_to_cycles(u32 usec, unsigned long clk_hz) 2384 { 2385 u64 tmp = (u64)clk_hz * usec; 2386 2387 do_div(tmp, USEC_PER_SEC); 2388 2389 return tmp > U32_MAX ? U32_MAX : tmp; 2390 } 2391 2392 static u32 mvpp2_cycles_to_usec(u32 cycles, unsigned long clk_hz) 2393 { 2394 u64 tmp = (u64)cycles * USEC_PER_SEC; 2395 2396 do_div(tmp, clk_hz); 2397 2398 return tmp > U32_MAX ? U32_MAX : tmp; 2399 } 2400 2401 /* Set the time delay in usec before Rx interrupt */ 2402 static void mvpp2_rx_time_coal_set(struct mvpp2_port *port, 2403 struct mvpp2_rx_queue *rxq) 2404 { 2405 unsigned long freq = port->priv->tclk; 2406 u32 val = mvpp2_usec_to_cycles(rxq->time_coal, freq); 2407 2408 if (val > MVPP2_MAX_ISR_RX_THRESHOLD) { 2409 rxq->time_coal = 2410 mvpp2_cycles_to_usec(MVPP2_MAX_ISR_RX_THRESHOLD, freq); 2411 2412 /* re-evaluate to get actual register value */ 2413 val = mvpp2_usec_to_cycles(rxq->time_coal, freq); 2414 } 2415 2416 mvpp2_write(port->priv, MVPP2_ISR_RX_THRESHOLD_REG(rxq->id), val); 2417 } 2418 2419 static void mvpp2_tx_time_coal_set(struct mvpp2_port *port) 2420 { 2421 unsigned long freq = port->priv->tclk; 2422 u32 val = mvpp2_usec_to_cycles(port->tx_time_coal, freq); 2423 2424 if (val > MVPP2_MAX_ISR_TX_THRESHOLD) { 2425 port->tx_time_coal = 2426 mvpp2_cycles_to_usec(MVPP2_MAX_ISR_TX_THRESHOLD, freq); 2427 2428 /* re-evaluate to get actual register value */ 2429 val = mvpp2_usec_to_cycles(port->tx_time_coal, freq); 2430 } 2431 2432 mvpp2_write(port->priv, MVPP2_ISR_TX_THRESHOLD_REG(port->id), val); 2433 } 2434 2435 /* Free Tx queue skbuffs */ 2436 static void mvpp2_txq_bufs_free(struct mvpp2_port *port, 2437 struct mvpp2_tx_queue *txq, 2438 struct mvpp2_txq_pcpu *txq_pcpu, int num) 2439 { 2440 int i; 2441 2442 for (i = 0; i < num; i++) { 2443 struct mvpp2_txq_pcpu_buf *tx_buf = 2444 txq_pcpu->buffs + txq_pcpu->txq_get_index; 2445 2446 if (!IS_TSO_HEADER(txq_pcpu, tx_buf->dma) && 2447 tx_buf->type != MVPP2_TYPE_XDP_TX) 2448 dma_unmap_single(port->dev->dev.parent, tx_buf->dma, 2449 tx_buf->size, DMA_TO_DEVICE); 2450 if (tx_buf->type == MVPP2_TYPE_SKB && tx_buf->skb) 2451 dev_kfree_skb_any(tx_buf->skb); 2452 else if (tx_buf->type == MVPP2_TYPE_XDP_TX || 2453 tx_buf->type == MVPP2_TYPE_XDP_NDO) 2454 xdp_return_frame(tx_buf->xdpf); 2455 2456 mvpp2_txq_inc_get(txq_pcpu); 2457 } 2458 } 2459 2460 static inline struct mvpp2_rx_queue *mvpp2_get_rx_queue(struct mvpp2_port *port, 2461 u32 cause) 2462 { 2463 int queue = fls(cause) - 1; 2464 2465 return port->rxqs[queue]; 2466 } 2467 2468 static inline struct mvpp2_tx_queue *mvpp2_get_tx_queue(struct mvpp2_port *port, 2469 u32 cause) 2470 { 2471 int queue = fls(cause) - 1; 2472 2473 return port->txqs[queue]; 2474 } 2475 2476 /* Handle end of transmission */ 2477 static void mvpp2_txq_done(struct mvpp2_port *port, struct mvpp2_tx_queue *txq, 2478 struct mvpp2_txq_pcpu *txq_pcpu) 2479 { 2480 struct netdev_queue *nq = netdev_get_tx_queue(port->dev, txq->log_id); 2481 int tx_done; 2482 2483 if (txq_pcpu->thread != mvpp2_cpu_to_thread(port->priv, smp_processor_id())) 2484 netdev_err(port->dev, "wrong cpu on the end of Tx processing\n"); 2485 2486 tx_done = mvpp2_txq_sent_desc_proc(port, txq); 2487 if (!tx_done) 2488 return; 2489 mvpp2_txq_bufs_free(port, txq, txq_pcpu, tx_done); 2490 2491 txq_pcpu->count -= tx_done; 2492 2493 if (netif_tx_queue_stopped(nq)) 2494 if (txq_pcpu->count <= txq_pcpu->wake_threshold) 2495 netif_tx_wake_queue(nq); 2496 } 2497 2498 static unsigned int mvpp2_tx_done(struct mvpp2_port *port, u32 cause, 2499 unsigned int thread) 2500 { 2501 struct mvpp2_tx_queue *txq; 2502 struct mvpp2_txq_pcpu *txq_pcpu; 2503 unsigned int tx_todo = 0; 2504 2505 while (cause) { 2506 txq = mvpp2_get_tx_queue(port, cause); 2507 if (!txq) 2508 break; 2509 2510 txq_pcpu = per_cpu_ptr(txq->pcpu, thread); 2511 2512 if (txq_pcpu->count) { 2513 mvpp2_txq_done(port, txq, txq_pcpu); 2514 tx_todo += txq_pcpu->count; 2515 } 2516 2517 cause &= ~(1 << txq->log_id); 2518 } 2519 return tx_todo; 2520 } 2521 2522 /* Rx/Tx queue initialization/cleanup methods */ 2523 2524 /* Allocate and initialize descriptors for aggr TXQ */ 2525 static int mvpp2_aggr_txq_init(struct platform_device *pdev, 2526 struct mvpp2_tx_queue *aggr_txq, 2527 unsigned int thread, struct mvpp2 *priv) 2528 { 2529 u32 txq_dma; 2530 2531 /* Allocate memory for TX descriptors */ 2532 aggr_txq->descs = dma_alloc_coherent(&pdev->dev, 2533 MVPP2_AGGR_TXQ_SIZE * MVPP2_DESC_ALIGNED_SIZE, 2534 &aggr_txq->descs_dma, GFP_KERNEL); 2535 if (!aggr_txq->descs) 2536 return -ENOMEM; 2537 2538 aggr_txq->last_desc = MVPP2_AGGR_TXQ_SIZE - 1; 2539 2540 /* Aggr TXQ no reset WA */ 2541 aggr_txq->next_desc_to_proc = mvpp2_read(priv, 2542 MVPP2_AGGR_TXQ_INDEX_REG(thread)); 2543 2544 /* Set Tx descriptors queue starting address indirect 2545 * access 2546 */ 2547 if (priv->hw_version == MVPP21) 2548 txq_dma = aggr_txq->descs_dma; 2549 else 2550 txq_dma = aggr_txq->descs_dma >> 2551 MVPP22_AGGR_TXQ_DESC_ADDR_OFFS; 2552 2553 mvpp2_write(priv, MVPP2_AGGR_TXQ_DESC_ADDR_REG(thread), txq_dma); 2554 mvpp2_write(priv, MVPP2_AGGR_TXQ_DESC_SIZE_REG(thread), 2555 MVPP2_AGGR_TXQ_SIZE); 2556 2557 return 0; 2558 } 2559 2560 /* Create a specified Rx queue */ 2561 static int mvpp2_rxq_init(struct mvpp2_port *port, 2562 struct mvpp2_rx_queue *rxq) 2563 { 2564 struct mvpp2 *priv = port->priv; 2565 unsigned int thread; 2566 u32 rxq_dma; 2567 int err; 2568 2569 rxq->size = port->rx_ring_size; 2570 2571 /* Allocate memory for RX descriptors */ 2572 rxq->descs = dma_alloc_coherent(port->dev->dev.parent, 2573 rxq->size * MVPP2_DESC_ALIGNED_SIZE, 2574 &rxq->descs_dma, GFP_KERNEL); 2575 if (!rxq->descs) 2576 return -ENOMEM; 2577 2578 rxq->last_desc = rxq->size - 1; 2579 2580 /* Zero occupied and non-occupied counters - direct access */ 2581 mvpp2_write(port->priv, MVPP2_RXQ_STATUS_REG(rxq->id), 0); 2582 2583 /* Set Rx descriptors queue starting address - indirect access */ 2584 thread = mvpp2_cpu_to_thread(port->priv, get_cpu()); 2585 mvpp2_thread_write(port->priv, thread, MVPP2_RXQ_NUM_REG, rxq->id); 2586 if (port->priv->hw_version == MVPP21) 2587 rxq_dma = rxq->descs_dma; 2588 else 2589 rxq_dma = rxq->descs_dma >> MVPP22_DESC_ADDR_OFFS; 2590 mvpp2_thread_write(port->priv, thread, MVPP2_RXQ_DESC_ADDR_REG, rxq_dma); 2591 mvpp2_thread_write(port->priv, thread, MVPP2_RXQ_DESC_SIZE_REG, rxq->size); 2592 mvpp2_thread_write(port->priv, thread, MVPP2_RXQ_INDEX_REG, 0); 2593 put_cpu(); 2594 2595 /* Set Offset */ 2596 mvpp2_rxq_offset_set(port, rxq->id, MVPP2_SKB_HEADROOM); 2597 2598 /* Set coalescing pkts and time */ 2599 mvpp2_rx_pkts_coal_set(port, rxq); 2600 mvpp2_rx_time_coal_set(port, rxq); 2601 2602 /* Add number of descriptors ready for receiving packets */ 2603 mvpp2_rxq_status_update(port, rxq->id, 0, rxq->size); 2604 2605 if (priv->percpu_pools) { 2606 err = xdp_rxq_info_reg(&rxq->xdp_rxq_short, port->dev, rxq->id); 2607 if (err < 0) 2608 goto err_free_dma; 2609 2610 err = xdp_rxq_info_reg(&rxq->xdp_rxq_long, port->dev, rxq->id); 2611 if (err < 0) 2612 goto err_unregister_rxq_short; 2613 2614 /* Every RXQ has a pool for short and another for long packets */ 2615 err = xdp_rxq_info_reg_mem_model(&rxq->xdp_rxq_short, 2616 MEM_TYPE_PAGE_POOL, 2617 priv->page_pool[rxq->logic_rxq]); 2618 if (err < 0) 2619 goto err_unregister_rxq_long; 2620 2621 err = xdp_rxq_info_reg_mem_model(&rxq->xdp_rxq_long, 2622 MEM_TYPE_PAGE_POOL, 2623 priv->page_pool[rxq->logic_rxq + 2624 port->nrxqs]); 2625 if (err < 0) 2626 goto err_unregister_mem_rxq_short; 2627 } 2628 2629 return 0; 2630 2631 err_unregister_mem_rxq_short: 2632 xdp_rxq_info_unreg_mem_model(&rxq->xdp_rxq_short); 2633 err_unregister_rxq_long: 2634 xdp_rxq_info_unreg(&rxq->xdp_rxq_long); 2635 err_unregister_rxq_short: 2636 xdp_rxq_info_unreg(&rxq->xdp_rxq_short); 2637 err_free_dma: 2638 dma_free_coherent(port->dev->dev.parent, 2639 rxq->size * MVPP2_DESC_ALIGNED_SIZE, 2640 rxq->descs, rxq->descs_dma); 2641 return err; 2642 } 2643 2644 /* Push packets received by the RXQ to BM pool */ 2645 static void mvpp2_rxq_drop_pkts(struct mvpp2_port *port, 2646 struct mvpp2_rx_queue *rxq) 2647 { 2648 int rx_received, i; 2649 2650 rx_received = mvpp2_rxq_received(port, rxq->id); 2651 if (!rx_received) 2652 return; 2653 2654 for (i = 0; i < rx_received; i++) { 2655 struct mvpp2_rx_desc *rx_desc = mvpp2_rxq_next_desc_get(rxq); 2656 u32 status = mvpp2_rxdesc_status_get(port, rx_desc); 2657 int pool; 2658 2659 pool = (status & MVPP2_RXD_BM_POOL_ID_MASK) >> 2660 MVPP2_RXD_BM_POOL_ID_OFFS; 2661 2662 mvpp2_bm_pool_put(port, pool, 2663 mvpp2_rxdesc_dma_addr_get(port, rx_desc), 2664 mvpp2_rxdesc_cookie_get(port, rx_desc)); 2665 } 2666 mvpp2_rxq_status_update(port, rxq->id, rx_received, rx_received); 2667 } 2668 2669 /* Cleanup Rx queue */ 2670 static void mvpp2_rxq_deinit(struct mvpp2_port *port, 2671 struct mvpp2_rx_queue *rxq) 2672 { 2673 unsigned int thread; 2674 2675 if (xdp_rxq_info_is_reg(&rxq->xdp_rxq_short)) 2676 xdp_rxq_info_unreg(&rxq->xdp_rxq_short); 2677 2678 if (xdp_rxq_info_is_reg(&rxq->xdp_rxq_long)) 2679 xdp_rxq_info_unreg(&rxq->xdp_rxq_long); 2680 2681 mvpp2_rxq_drop_pkts(port, rxq); 2682 2683 if (rxq->descs) 2684 dma_free_coherent(port->dev->dev.parent, 2685 rxq->size * MVPP2_DESC_ALIGNED_SIZE, 2686 rxq->descs, 2687 rxq->descs_dma); 2688 2689 rxq->descs = NULL; 2690 rxq->last_desc = 0; 2691 rxq->next_desc_to_proc = 0; 2692 rxq->descs_dma = 0; 2693 2694 /* Clear Rx descriptors queue starting address and size; 2695 * free descriptor number 2696 */ 2697 mvpp2_write(port->priv, MVPP2_RXQ_STATUS_REG(rxq->id), 0); 2698 thread = mvpp2_cpu_to_thread(port->priv, get_cpu()); 2699 mvpp2_thread_write(port->priv, thread, MVPP2_RXQ_NUM_REG, rxq->id); 2700 mvpp2_thread_write(port->priv, thread, MVPP2_RXQ_DESC_ADDR_REG, 0); 2701 mvpp2_thread_write(port->priv, thread, MVPP2_RXQ_DESC_SIZE_REG, 0); 2702 put_cpu(); 2703 } 2704 2705 /* Create and initialize a Tx queue */ 2706 static int mvpp2_txq_init(struct mvpp2_port *port, 2707 struct mvpp2_tx_queue *txq) 2708 { 2709 u32 val; 2710 unsigned int thread; 2711 int desc, desc_per_txq, tx_port_num; 2712 struct mvpp2_txq_pcpu *txq_pcpu; 2713 2714 txq->size = port->tx_ring_size; 2715 2716 /* Allocate memory for Tx descriptors */ 2717 txq->descs = dma_alloc_coherent(port->dev->dev.parent, 2718 txq->size * MVPP2_DESC_ALIGNED_SIZE, 2719 &txq->descs_dma, GFP_KERNEL); 2720 if (!txq->descs) 2721 return -ENOMEM; 2722 2723 txq->last_desc = txq->size - 1; 2724 2725 /* Set Tx descriptors queue starting address - indirect access */ 2726 thread = mvpp2_cpu_to_thread(port->priv, get_cpu()); 2727 mvpp2_thread_write(port->priv, thread, MVPP2_TXQ_NUM_REG, txq->id); 2728 mvpp2_thread_write(port->priv, thread, MVPP2_TXQ_DESC_ADDR_REG, 2729 txq->descs_dma); 2730 mvpp2_thread_write(port->priv, thread, MVPP2_TXQ_DESC_SIZE_REG, 2731 txq->size & MVPP2_TXQ_DESC_SIZE_MASK); 2732 mvpp2_thread_write(port->priv, thread, MVPP2_TXQ_INDEX_REG, 0); 2733 mvpp2_thread_write(port->priv, thread, MVPP2_TXQ_RSVD_CLR_REG, 2734 txq->id << MVPP2_TXQ_RSVD_CLR_OFFSET); 2735 val = mvpp2_thread_read(port->priv, thread, MVPP2_TXQ_PENDING_REG); 2736 val &= ~MVPP2_TXQ_PENDING_MASK; 2737 mvpp2_thread_write(port->priv, thread, MVPP2_TXQ_PENDING_REG, val); 2738 2739 /* Calculate base address in prefetch buffer. We reserve 16 descriptors 2740 * for each existing TXQ. 2741 * TCONTS for PON port must be continuous from 0 to MVPP2_MAX_TCONT 2742 * GBE ports assumed to be continuous from 0 to MVPP2_MAX_PORTS 2743 */ 2744 desc_per_txq = 16; 2745 desc = (port->id * MVPP2_MAX_TXQ * desc_per_txq) + 2746 (txq->log_id * desc_per_txq); 2747 2748 mvpp2_thread_write(port->priv, thread, MVPP2_TXQ_PREF_BUF_REG, 2749 MVPP2_PREF_BUF_PTR(desc) | MVPP2_PREF_BUF_SIZE_16 | 2750 MVPP2_PREF_BUF_THRESH(desc_per_txq / 2)); 2751 put_cpu(); 2752 2753 /* WRR / EJP configuration - indirect access */ 2754 tx_port_num = mvpp2_egress_port(port); 2755 mvpp2_write(port->priv, MVPP2_TXP_SCHED_PORT_INDEX_REG, tx_port_num); 2756 2757 val = mvpp2_read(port->priv, MVPP2_TXQ_SCHED_REFILL_REG(txq->log_id)); 2758 val &= ~MVPP2_TXQ_REFILL_PERIOD_ALL_MASK; 2759 val |= MVPP2_TXQ_REFILL_PERIOD_MASK(1); 2760 val |= MVPP2_TXQ_REFILL_TOKENS_ALL_MASK; 2761 mvpp2_write(port->priv, MVPP2_TXQ_SCHED_REFILL_REG(txq->log_id), val); 2762 2763 val = MVPP2_TXQ_TOKEN_SIZE_MAX; 2764 mvpp2_write(port->priv, MVPP2_TXQ_SCHED_TOKEN_SIZE_REG(txq->log_id), 2765 val); 2766 2767 for (thread = 0; thread < port->priv->nthreads; thread++) { 2768 txq_pcpu = per_cpu_ptr(txq->pcpu, thread); 2769 txq_pcpu->size = txq->size; 2770 txq_pcpu->buffs = kmalloc_array(txq_pcpu->size, 2771 sizeof(*txq_pcpu->buffs), 2772 GFP_KERNEL); 2773 if (!txq_pcpu->buffs) 2774 return -ENOMEM; 2775 2776 txq_pcpu->count = 0; 2777 txq_pcpu->reserved_num = 0; 2778 txq_pcpu->txq_put_index = 0; 2779 txq_pcpu->txq_get_index = 0; 2780 txq_pcpu->tso_headers = NULL; 2781 2782 txq_pcpu->stop_threshold = txq->size - MVPP2_MAX_SKB_DESCS; 2783 txq_pcpu->wake_threshold = txq_pcpu->stop_threshold / 2; 2784 2785 txq_pcpu->tso_headers = 2786 dma_alloc_coherent(port->dev->dev.parent, 2787 txq_pcpu->size * TSO_HEADER_SIZE, 2788 &txq_pcpu->tso_headers_dma, 2789 GFP_KERNEL); 2790 if (!txq_pcpu->tso_headers) 2791 return -ENOMEM; 2792 } 2793 2794 return 0; 2795 } 2796 2797 /* Free allocated TXQ resources */ 2798 static void mvpp2_txq_deinit(struct mvpp2_port *port, 2799 struct mvpp2_tx_queue *txq) 2800 { 2801 struct mvpp2_txq_pcpu *txq_pcpu; 2802 unsigned int thread; 2803 2804 for (thread = 0; thread < port->priv->nthreads; thread++) { 2805 txq_pcpu = per_cpu_ptr(txq->pcpu, thread); 2806 kfree(txq_pcpu->buffs); 2807 2808 if (txq_pcpu->tso_headers) 2809 dma_free_coherent(port->dev->dev.parent, 2810 txq_pcpu->size * TSO_HEADER_SIZE, 2811 txq_pcpu->tso_headers, 2812 txq_pcpu->tso_headers_dma); 2813 2814 txq_pcpu->tso_headers = NULL; 2815 } 2816 2817 if (txq->descs) 2818 dma_free_coherent(port->dev->dev.parent, 2819 txq->size * MVPP2_DESC_ALIGNED_SIZE, 2820 txq->descs, txq->descs_dma); 2821 2822 txq->descs = NULL; 2823 txq->last_desc = 0; 2824 txq->next_desc_to_proc = 0; 2825 txq->descs_dma = 0; 2826 2827 /* Set minimum bandwidth for disabled TXQs */ 2828 mvpp2_write(port->priv, MVPP2_TXQ_SCHED_TOKEN_CNTR_REG(txq->log_id), 0); 2829 2830 /* Set Tx descriptors queue starting address and size */ 2831 thread = mvpp2_cpu_to_thread(port->priv, get_cpu()); 2832 mvpp2_thread_write(port->priv, thread, MVPP2_TXQ_NUM_REG, txq->id); 2833 mvpp2_thread_write(port->priv, thread, MVPP2_TXQ_DESC_ADDR_REG, 0); 2834 mvpp2_thread_write(port->priv, thread, MVPP2_TXQ_DESC_SIZE_REG, 0); 2835 put_cpu(); 2836 } 2837 2838 /* Cleanup Tx ports */ 2839 static void mvpp2_txq_clean(struct mvpp2_port *port, struct mvpp2_tx_queue *txq) 2840 { 2841 struct mvpp2_txq_pcpu *txq_pcpu; 2842 int delay, pending; 2843 unsigned int thread = mvpp2_cpu_to_thread(port->priv, get_cpu()); 2844 u32 val; 2845 2846 mvpp2_thread_write(port->priv, thread, MVPP2_TXQ_NUM_REG, txq->id); 2847 val = mvpp2_thread_read(port->priv, thread, MVPP2_TXQ_PREF_BUF_REG); 2848 val |= MVPP2_TXQ_DRAIN_EN_MASK; 2849 mvpp2_thread_write(port->priv, thread, MVPP2_TXQ_PREF_BUF_REG, val); 2850 2851 /* The napi queue has been stopped so wait for all packets 2852 * to be transmitted. 2853 */ 2854 delay = 0; 2855 do { 2856 if (delay >= MVPP2_TX_PENDING_TIMEOUT_MSEC) { 2857 netdev_warn(port->dev, 2858 "port %d: cleaning queue %d timed out\n", 2859 port->id, txq->log_id); 2860 break; 2861 } 2862 mdelay(1); 2863 delay++; 2864 2865 pending = mvpp2_thread_read(port->priv, thread, 2866 MVPP2_TXQ_PENDING_REG); 2867 pending &= MVPP2_TXQ_PENDING_MASK; 2868 } while (pending); 2869 2870 val &= ~MVPP2_TXQ_DRAIN_EN_MASK; 2871 mvpp2_thread_write(port->priv, thread, MVPP2_TXQ_PREF_BUF_REG, val); 2872 put_cpu(); 2873 2874 for (thread = 0; thread < port->priv->nthreads; thread++) { 2875 txq_pcpu = per_cpu_ptr(txq->pcpu, thread); 2876 2877 /* Release all packets */ 2878 mvpp2_txq_bufs_free(port, txq, txq_pcpu, txq_pcpu->count); 2879 2880 /* Reset queue */ 2881 txq_pcpu->count = 0; 2882 txq_pcpu->txq_put_index = 0; 2883 txq_pcpu->txq_get_index = 0; 2884 } 2885 } 2886 2887 /* Cleanup all Tx queues */ 2888 static void mvpp2_cleanup_txqs(struct mvpp2_port *port) 2889 { 2890 struct mvpp2_tx_queue *txq; 2891 int queue; 2892 u32 val; 2893 2894 val = mvpp2_read(port->priv, MVPP2_TX_PORT_FLUSH_REG); 2895 2896 /* Reset Tx ports and delete Tx queues */ 2897 val |= MVPP2_TX_PORT_FLUSH_MASK(port->id); 2898 mvpp2_write(port->priv, MVPP2_TX_PORT_FLUSH_REG, val); 2899 2900 for (queue = 0; queue < port->ntxqs; queue++) { 2901 txq = port->txqs[queue]; 2902 mvpp2_txq_clean(port, txq); 2903 mvpp2_txq_deinit(port, txq); 2904 } 2905 2906 on_each_cpu(mvpp2_txq_sent_counter_clear, port, 1); 2907 2908 val &= ~MVPP2_TX_PORT_FLUSH_MASK(port->id); 2909 mvpp2_write(port->priv, MVPP2_TX_PORT_FLUSH_REG, val); 2910 } 2911 2912 /* Cleanup all Rx queues */ 2913 static void mvpp2_cleanup_rxqs(struct mvpp2_port *port) 2914 { 2915 int queue; 2916 2917 for (queue = 0; queue < port->nrxqs; queue++) 2918 mvpp2_rxq_deinit(port, port->rxqs[queue]); 2919 } 2920 2921 /* Init all Rx queues for port */ 2922 static int mvpp2_setup_rxqs(struct mvpp2_port *port) 2923 { 2924 int queue, err; 2925 2926 for (queue = 0; queue < port->nrxqs; queue++) { 2927 err = mvpp2_rxq_init(port, port->rxqs[queue]); 2928 if (err) 2929 goto err_cleanup; 2930 } 2931 return 0; 2932 2933 err_cleanup: 2934 mvpp2_cleanup_rxqs(port); 2935 return err; 2936 } 2937 2938 /* Init all tx queues for port */ 2939 static int mvpp2_setup_txqs(struct mvpp2_port *port) 2940 { 2941 struct mvpp2_tx_queue *txq; 2942 int queue, err; 2943 2944 for (queue = 0; queue < port->ntxqs; queue++) { 2945 txq = port->txqs[queue]; 2946 err = mvpp2_txq_init(port, txq); 2947 if (err) 2948 goto err_cleanup; 2949 2950 /* Assign this queue to a CPU */ 2951 if (queue < num_possible_cpus()) 2952 netif_set_xps_queue(port->dev, cpumask_of(queue), queue); 2953 } 2954 2955 if (port->has_tx_irqs) { 2956 mvpp2_tx_time_coal_set(port); 2957 for (queue = 0; queue < port->ntxqs; queue++) { 2958 txq = port->txqs[queue]; 2959 mvpp2_tx_pkts_coal_set(port, txq); 2960 } 2961 } 2962 2963 on_each_cpu(mvpp2_txq_sent_counter_clear, port, 1); 2964 return 0; 2965 2966 err_cleanup: 2967 mvpp2_cleanup_txqs(port); 2968 return err; 2969 } 2970 2971 /* The callback for per-port interrupt */ 2972 static irqreturn_t mvpp2_isr(int irq, void *dev_id) 2973 { 2974 struct mvpp2_queue_vector *qv = dev_id; 2975 2976 mvpp2_qvec_interrupt_disable(qv); 2977 2978 napi_schedule(&qv->napi); 2979 2980 return IRQ_HANDLED; 2981 } 2982 2983 /* Per-port interrupt for link status changes */ 2984 static irqreturn_t mvpp2_link_status_isr(int irq, void *dev_id) 2985 { 2986 struct mvpp2_port *port = (struct mvpp2_port *)dev_id; 2987 struct net_device *dev = port->dev; 2988 bool event = false, link = false; 2989 u32 val; 2990 2991 mvpp22_gop_mask_irq(port); 2992 2993 if (mvpp2_port_supports_xlg(port) && 2994 mvpp2_is_xlg(port->phy_interface)) { 2995 val = readl(port->base + MVPP22_XLG_INT_STAT); 2996 if (val & MVPP22_XLG_INT_STAT_LINK) { 2997 event = true; 2998 val = readl(port->base + MVPP22_XLG_STATUS); 2999 if (val & MVPP22_XLG_STATUS_LINK_UP) 3000 link = true; 3001 } 3002 } else if (phy_interface_mode_is_rgmii(port->phy_interface) || 3003 phy_interface_mode_is_8023z(port->phy_interface) || 3004 port->phy_interface == PHY_INTERFACE_MODE_SGMII) { 3005 val = readl(port->base + MVPP22_GMAC_INT_STAT); 3006 if (val & MVPP22_GMAC_INT_STAT_LINK) { 3007 event = true; 3008 val = readl(port->base + MVPP2_GMAC_STATUS0); 3009 if (val & MVPP2_GMAC_STATUS0_LINK_UP) 3010 link = true; 3011 } 3012 } 3013 3014 if (port->phylink) { 3015 phylink_mac_change(port->phylink, link); 3016 goto handled; 3017 } 3018 3019 if (!netif_running(dev) || !event) 3020 goto handled; 3021 3022 if (link) { 3023 mvpp2_interrupts_enable(port); 3024 3025 mvpp2_egress_enable(port); 3026 mvpp2_ingress_enable(port); 3027 netif_carrier_on(dev); 3028 netif_tx_wake_all_queues(dev); 3029 } else { 3030 netif_tx_stop_all_queues(dev); 3031 netif_carrier_off(dev); 3032 mvpp2_ingress_disable(port); 3033 mvpp2_egress_disable(port); 3034 3035 mvpp2_interrupts_disable(port); 3036 } 3037 3038 handled: 3039 mvpp22_gop_unmask_irq(port); 3040 return IRQ_HANDLED; 3041 } 3042 3043 static enum hrtimer_restart mvpp2_hr_timer_cb(struct hrtimer *timer) 3044 { 3045 struct net_device *dev; 3046 struct mvpp2_port *port; 3047 struct mvpp2_port_pcpu *port_pcpu; 3048 unsigned int tx_todo, cause; 3049 3050 port_pcpu = container_of(timer, struct mvpp2_port_pcpu, tx_done_timer); 3051 dev = port_pcpu->dev; 3052 3053 if (!netif_running(dev)) 3054 return HRTIMER_NORESTART; 3055 3056 port_pcpu->timer_scheduled = false; 3057 port = netdev_priv(dev); 3058 3059 /* Process all the Tx queues */ 3060 cause = (1 << port->ntxqs) - 1; 3061 tx_todo = mvpp2_tx_done(port, cause, 3062 mvpp2_cpu_to_thread(port->priv, smp_processor_id())); 3063 3064 /* Set the timer in case not all the packets were processed */ 3065 if (tx_todo && !port_pcpu->timer_scheduled) { 3066 port_pcpu->timer_scheduled = true; 3067 hrtimer_forward_now(&port_pcpu->tx_done_timer, 3068 MVPP2_TXDONE_HRTIMER_PERIOD_NS); 3069 3070 return HRTIMER_RESTART; 3071 } 3072 return HRTIMER_NORESTART; 3073 } 3074 3075 /* Main RX/TX processing routines */ 3076 3077 /* Display more error info */ 3078 static void mvpp2_rx_error(struct mvpp2_port *port, 3079 struct mvpp2_rx_desc *rx_desc) 3080 { 3081 u32 status = mvpp2_rxdesc_status_get(port, rx_desc); 3082 size_t sz = mvpp2_rxdesc_size_get(port, rx_desc); 3083 char *err_str = NULL; 3084 3085 switch (status & MVPP2_RXD_ERR_CODE_MASK) { 3086 case MVPP2_RXD_ERR_CRC: 3087 err_str = "crc"; 3088 break; 3089 case MVPP2_RXD_ERR_OVERRUN: 3090 err_str = "overrun"; 3091 break; 3092 case MVPP2_RXD_ERR_RESOURCE: 3093 err_str = "resource"; 3094 break; 3095 } 3096 if (err_str && net_ratelimit()) 3097 netdev_err(port->dev, 3098 "bad rx status %08x (%s error), size=%zu\n", 3099 status, err_str, sz); 3100 } 3101 3102 /* Handle RX checksum offload */ 3103 static void mvpp2_rx_csum(struct mvpp2_port *port, u32 status, 3104 struct sk_buff *skb) 3105 { 3106 if (((status & MVPP2_RXD_L3_IP4) && 3107 !(status & MVPP2_RXD_IP4_HEADER_ERR)) || 3108 (status & MVPP2_RXD_L3_IP6)) 3109 if (((status & MVPP2_RXD_L4_UDP) || 3110 (status & MVPP2_RXD_L4_TCP)) && 3111 (status & MVPP2_RXD_L4_CSUM_OK)) { 3112 skb->csum = 0; 3113 skb->ip_summed = CHECKSUM_UNNECESSARY; 3114 return; 3115 } 3116 3117 skb->ip_summed = CHECKSUM_NONE; 3118 } 3119 3120 /* Allocate a new skb and add it to BM pool */ 3121 static int mvpp2_rx_refill(struct mvpp2_port *port, 3122 struct mvpp2_bm_pool *bm_pool, 3123 struct page_pool *page_pool, int pool) 3124 { 3125 dma_addr_t dma_addr; 3126 phys_addr_t phys_addr; 3127 void *buf; 3128 3129 buf = mvpp2_buf_alloc(port, bm_pool, page_pool, 3130 &dma_addr, &phys_addr, GFP_ATOMIC); 3131 if (!buf) 3132 return -ENOMEM; 3133 3134 mvpp2_bm_pool_put(port, pool, dma_addr, phys_addr); 3135 3136 return 0; 3137 } 3138 3139 /* Handle tx checksum */ 3140 static u32 mvpp2_skb_tx_csum(struct mvpp2_port *port, struct sk_buff *skb) 3141 { 3142 if (skb->ip_summed == CHECKSUM_PARTIAL) { 3143 int ip_hdr_len = 0; 3144 u8 l4_proto; 3145 __be16 l3_proto = vlan_get_protocol(skb); 3146 3147 if (l3_proto == htons(ETH_P_IP)) { 3148 struct iphdr *ip4h = ip_hdr(skb); 3149 3150 /* Calculate IPv4 checksum and L4 checksum */ 3151 ip_hdr_len = ip4h->ihl; 3152 l4_proto = ip4h->protocol; 3153 } else if (l3_proto == htons(ETH_P_IPV6)) { 3154 struct ipv6hdr *ip6h = ipv6_hdr(skb); 3155 3156 /* Read l4_protocol from one of IPv6 extra headers */ 3157 if (skb_network_header_len(skb) > 0) 3158 ip_hdr_len = (skb_network_header_len(skb) >> 2); 3159 l4_proto = ip6h->nexthdr; 3160 } else { 3161 return MVPP2_TXD_L4_CSUM_NOT; 3162 } 3163 3164 return mvpp2_txq_desc_csum(skb_network_offset(skb), 3165 l3_proto, ip_hdr_len, l4_proto); 3166 } 3167 3168 return MVPP2_TXD_L4_CSUM_NOT | MVPP2_TXD_IP_CSUM_DISABLE; 3169 } 3170 3171 static void mvpp2_xdp_finish_tx(struct mvpp2_port *port, u16 txq_id, int nxmit, int nxmit_byte) 3172 { 3173 unsigned int thread = mvpp2_cpu_to_thread(port->priv, smp_processor_id()); 3174 struct mvpp2_tx_queue *aggr_txq; 3175 struct mvpp2_txq_pcpu *txq_pcpu; 3176 struct mvpp2_tx_queue *txq; 3177 struct netdev_queue *nq; 3178 3179 txq = port->txqs[txq_id]; 3180 txq_pcpu = per_cpu_ptr(txq->pcpu, thread); 3181 nq = netdev_get_tx_queue(port->dev, txq_id); 3182 aggr_txq = &port->priv->aggr_txqs[thread]; 3183 3184 txq_pcpu->reserved_num -= nxmit; 3185 txq_pcpu->count += nxmit; 3186 aggr_txq->count += nxmit; 3187 3188 /* Enable transmit */ 3189 wmb(); 3190 mvpp2_aggr_txq_pend_desc_add(port, nxmit); 3191 3192 if (txq_pcpu->count >= txq_pcpu->stop_threshold) 3193 netif_tx_stop_queue(nq); 3194 3195 /* Finalize TX processing */ 3196 if (!port->has_tx_irqs && txq_pcpu->count >= txq->done_pkts_coal) 3197 mvpp2_txq_done(port, txq, txq_pcpu); 3198 } 3199 3200 static int 3201 mvpp2_xdp_submit_frame(struct mvpp2_port *port, u16 txq_id, 3202 struct xdp_frame *xdpf, bool dma_map) 3203 { 3204 unsigned int thread = mvpp2_cpu_to_thread(port->priv, smp_processor_id()); 3205 u32 tx_cmd = MVPP2_TXD_L4_CSUM_NOT | MVPP2_TXD_IP_CSUM_DISABLE | 3206 MVPP2_TXD_F_DESC | MVPP2_TXD_L_DESC; 3207 enum mvpp2_tx_buf_type buf_type; 3208 struct mvpp2_txq_pcpu *txq_pcpu; 3209 struct mvpp2_tx_queue *aggr_txq; 3210 struct mvpp2_tx_desc *tx_desc; 3211 struct mvpp2_tx_queue *txq; 3212 int ret = MVPP2_XDP_TX; 3213 dma_addr_t dma_addr; 3214 3215 txq = port->txqs[txq_id]; 3216 txq_pcpu = per_cpu_ptr(txq->pcpu, thread); 3217 aggr_txq = &port->priv->aggr_txqs[thread]; 3218 3219 /* Check number of available descriptors */ 3220 if (mvpp2_aggr_desc_num_check(port, aggr_txq, 1) || 3221 mvpp2_txq_reserved_desc_num_proc(port, txq, txq_pcpu, 1)) { 3222 ret = MVPP2_XDP_DROPPED; 3223 goto out; 3224 } 3225 3226 /* Get a descriptor for the first part of the packet */ 3227 tx_desc = mvpp2_txq_next_desc_get(aggr_txq); 3228 mvpp2_txdesc_txq_set(port, tx_desc, txq->id); 3229 mvpp2_txdesc_size_set(port, tx_desc, xdpf->len); 3230 3231 if (dma_map) { 3232 /* XDP_REDIRECT or AF_XDP */ 3233 dma_addr = dma_map_single(port->dev->dev.parent, xdpf->data, 3234 xdpf->len, DMA_TO_DEVICE); 3235 3236 if (unlikely(dma_mapping_error(port->dev->dev.parent, dma_addr))) { 3237 mvpp2_txq_desc_put(txq); 3238 ret = MVPP2_XDP_DROPPED; 3239 goto out; 3240 } 3241 3242 buf_type = MVPP2_TYPE_XDP_NDO; 3243 } else { 3244 /* XDP_TX */ 3245 struct page *page = virt_to_page(xdpf->data); 3246 3247 dma_addr = page_pool_get_dma_addr(page) + 3248 sizeof(*xdpf) + xdpf->headroom; 3249 dma_sync_single_for_device(port->dev->dev.parent, dma_addr, 3250 xdpf->len, DMA_BIDIRECTIONAL); 3251 3252 buf_type = MVPP2_TYPE_XDP_TX; 3253 } 3254 3255 mvpp2_txdesc_dma_addr_set(port, tx_desc, dma_addr); 3256 3257 mvpp2_txdesc_cmd_set(port, tx_desc, tx_cmd); 3258 mvpp2_txq_inc_put(port, txq_pcpu, xdpf, tx_desc, buf_type); 3259 3260 out: 3261 return ret; 3262 } 3263 3264 static int 3265 mvpp2_xdp_xmit_back(struct mvpp2_port *port, struct xdp_buff *xdp) 3266 { 3267 struct mvpp2_pcpu_stats *stats = this_cpu_ptr(port->stats); 3268 struct xdp_frame *xdpf; 3269 u16 txq_id; 3270 int ret; 3271 3272 xdpf = xdp_convert_buff_to_frame(xdp); 3273 if (unlikely(!xdpf)) 3274 return MVPP2_XDP_DROPPED; 3275 3276 /* The first of the TX queues are used for XPS, 3277 * the second half for XDP_TX 3278 */ 3279 txq_id = mvpp2_cpu_to_thread(port->priv, smp_processor_id()) + (port->ntxqs / 2); 3280 3281 ret = mvpp2_xdp_submit_frame(port, txq_id, xdpf, false); 3282 if (ret == MVPP2_XDP_TX) { 3283 u64_stats_update_begin(&stats->syncp); 3284 stats->tx_bytes += xdpf->len; 3285 stats->tx_packets++; 3286 stats->xdp_tx++; 3287 u64_stats_update_end(&stats->syncp); 3288 3289 mvpp2_xdp_finish_tx(port, txq_id, 1, xdpf->len); 3290 } else { 3291 u64_stats_update_begin(&stats->syncp); 3292 stats->xdp_tx_err++; 3293 u64_stats_update_end(&stats->syncp); 3294 } 3295 3296 return ret; 3297 } 3298 3299 static int 3300 mvpp2_xdp_xmit(struct net_device *dev, int num_frame, 3301 struct xdp_frame **frames, u32 flags) 3302 { 3303 struct mvpp2_port *port = netdev_priv(dev); 3304 int i, nxmit_byte = 0, nxmit = num_frame; 3305 struct mvpp2_pcpu_stats *stats; 3306 u16 txq_id; 3307 u32 ret; 3308 3309 if (unlikely(test_bit(0, &port->state))) 3310 return -ENETDOWN; 3311 3312 if (unlikely(flags & ~XDP_XMIT_FLAGS_MASK)) 3313 return -EINVAL; 3314 3315 /* The first of the TX queues are used for XPS, 3316 * the second half for XDP_TX 3317 */ 3318 txq_id = mvpp2_cpu_to_thread(port->priv, smp_processor_id()) + (port->ntxqs / 2); 3319 3320 for (i = 0; i < num_frame; i++) { 3321 ret = mvpp2_xdp_submit_frame(port, txq_id, frames[i], true); 3322 if (ret == MVPP2_XDP_TX) { 3323 nxmit_byte += frames[i]->len; 3324 } else { 3325 xdp_return_frame_rx_napi(frames[i]); 3326 nxmit--; 3327 } 3328 } 3329 3330 if (likely(nxmit > 0)) 3331 mvpp2_xdp_finish_tx(port, txq_id, nxmit, nxmit_byte); 3332 3333 stats = this_cpu_ptr(port->stats); 3334 u64_stats_update_begin(&stats->syncp); 3335 stats->tx_bytes += nxmit_byte; 3336 stats->tx_packets += nxmit; 3337 stats->xdp_xmit += nxmit; 3338 stats->xdp_xmit_err += num_frame - nxmit; 3339 u64_stats_update_end(&stats->syncp); 3340 3341 return nxmit; 3342 } 3343 3344 static int 3345 mvpp2_run_xdp(struct mvpp2_port *port, struct mvpp2_rx_queue *rxq, 3346 struct bpf_prog *prog, struct xdp_buff *xdp, 3347 struct page_pool *pp, struct mvpp2_pcpu_stats *stats) 3348 { 3349 unsigned int len, sync, err; 3350 struct page *page; 3351 u32 ret, act; 3352 3353 len = xdp->data_end - xdp->data_hard_start - MVPP2_SKB_HEADROOM; 3354 act = bpf_prog_run_xdp(prog, xdp); 3355 3356 /* Due xdp_adjust_tail: DMA sync for_device cover max len CPU touch */ 3357 sync = xdp->data_end - xdp->data_hard_start - MVPP2_SKB_HEADROOM; 3358 sync = max(sync, len); 3359 3360 switch (act) { 3361 case XDP_PASS: 3362 stats->xdp_pass++; 3363 ret = MVPP2_XDP_PASS; 3364 break; 3365 case XDP_REDIRECT: 3366 err = xdp_do_redirect(port->dev, xdp, prog); 3367 if (unlikely(err)) { 3368 ret = MVPP2_XDP_DROPPED; 3369 page = virt_to_head_page(xdp->data); 3370 page_pool_put_page(pp, page, sync, true); 3371 } else { 3372 ret = MVPP2_XDP_REDIR; 3373 stats->xdp_redirect++; 3374 } 3375 break; 3376 case XDP_TX: 3377 ret = mvpp2_xdp_xmit_back(port, xdp); 3378 if (ret != MVPP2_XDP_TX) { 3379 page = virt_to_head_page(xdp->data); 3380 page_pool_put_page(pp, page, sync, true); 3381 } 3382 break; 3383 default: 3384 bpf_warn_invalid_xdp_action(act); 3385 fallthrough; 3386 case XDP_ABORTED: 3387 trace_xdp_exception(port->dev, prog, act); 3388 fallthrough; 3389 case XDP_DROP: 3390 page = virt_to_head_page(xdp->data); 3391 page_pool_put_page(pp, page, sync, true); 3392 ret = MVPP2_XDP_DROPPED; 3393 stats->xdp_drop++; 3394 break; 3395 } 3396 3397 return ret; 3398 } 3399 3400 /* Main rx processing */ 3401 static int mvpp2_rx(struct mvpp2_port *port, struct napi_struct *napi, 3402 int rx_todo, struct mvpp2_rx_queue *rxq) 3403 { 3404 struct net_device *dev = port->dev; 3405 struct mvpp2_pcpu_stats ps = {}; 3406 enum dma_data_direction dma_dir; 3407 struct bpf_prog *xdp_prog; 3408 struct xdp_buff xdp; 3409 int rx_received; 3410 int rx_done = 0; 3411 u32 xdp_ret = 0; 3412 3413 rcu_read_lock(); 3414 3415 xdp_prog = READ_ONCE(port->xdp_prog); 3416 3417 /* Get number of received packets and clamp the to-do */ 3418 rx_received = mvpp2_rxq_received(port, rxq->id); 3419 if (rx_todo > rx_received) 3420 rx_todo = rx_received; 3421 3422 while (rx_done < rx_todo) { 3423 struct mvpp2_rx_desc *rx_desc = mvpp2_rxq_next_desc_get(rxq); 3424 struct mvpp2_bm_pool *bm_pool; 3425 struct page_pool *pp = NULL; 3426 struct sk_buff *skb; 3427 unsigned int frag_size; 3428 dma_addr_t dma_addr; 3429 phys_addr_t phys_addr; 3430 u32 rx_status; 3431 int pool, rx_bytes, err, ret; 3432 void *data; 3433 3434 rx_done++; 3435 rx_status = mvpp2_rxdesc_status_get(port, rx_desc); 3436 rx_bytes = mvpp2_rxdesc_size_get(port, rx_desc); 3437 rx_bytes -= MVPP2_MH_SIZE; 3438 dma_addr = mvpp2_rxdesc_dma_addr_get(port, rx_desc); 3439 phys_addr = mvpp2_rxdesc_cookie_get(port, rx_desc); 3440 data = (void *)phys_to_virt(phys_addr); 3441 3442 pool = (rx_status & MVPP2_RXD_BM_POOL_ID_MASK) >> 3443 MVPP2_RXD_BM_POOL_ID_OFFS; 3444 bm_pool = &port->priv->bm_pools[pool]; 3445 3446 /* In case of an error, release the requested buffer pointer 3447 * to the Buffer Manager. This request process is controlled 3448 * by the hardware, and the information about the buffer is 3449 * comprised by the RX descriptor. 3450 */ 3451 if (rx_status & MVPP2_RXD_ERR_SUMMARY) 3452 goto err_drop_frame; 3453 3454 if (port->priv->percpu_pools) { 3455 pp = port->priv->page_pool[pool]; 3456 dma_dir = page_pool_get_dma_dir(pp); 3457 } else { 3458 dma_dir = DMA_FROM_DEVICE; 3459 } 3460 3461 dma_sync_single_for_cpu(dev->dev.parent, dma_addr, 3462 rx_bytes + MVPP2_MH_SIZE, 3463 dma_dir); 3464 3465 /* Prefetch header */ 3466 prefetch(data); 3467 3468 if (bm_pool->frag_size > PAGE_SIZE) 3469 frag_size = 0; 3470 else 3471 frag_size = bm_pool->frag_size; 3472 3473 if (xdp_prog) { 3474 xdp.data_hard_start = data; 3475 xdp.data = data + MVPP2_MH_SIZE + MVPP2_SKB_HEADROOM; 3476 xdp.data_end = xdp.data + rx_bytes; 3477 xdp.frame_sz = PAGE_SIZE; 3478 3479 if (bm_pool->pkt_size == MVPP2_BM_SHORT_PKT_SIZE) 3480 xdp.rxq = &rxq->xdp_rxq_short; 3481 else 3482 xdp.rxq = &rxq->xdp_rxq_long; 3483 3484 xdp_set_data_meta_invalid(&xdp); 3485 3486 ret = mvpp2_run_xdp(port, rxq, xdp_prog, &xdp, pp, &ps); 3487 3488 if (ret) { 3489 xdp_ret |= ret; 3490 err = mvpp2_rx_refill(port, bm_pool, pp, pool); 3491 if (err) { 3492 netdev_err(port->dev, "failed to refill BM pools\n"); 3493 goto err_drop_frame; 3494 } 3495 3496 ps.rx_packets++; 3497 ps.rx_bytes += rx_bytes; 3498 continue; 3499 } 3500 } 3501 3502 skb = build_skb(data, frag_size); 3503 if (!skb) { 3504 netdev_warn(port->dev, "skb build failed\n"); 3505 goto err_drop_frame; 3506 } 3507 3508 err = mvpp2_rx_refill(port, bm_pool, pp, pool); 3509 if (err) { 3510 netdev_err(port->dev, "failed to refill BM pools\n"); 3511 dev_kfree_skb_any(skb); 3512 goto err_drop_frame; 3513 } 3514 3515 if (pp) 3516 page_pool_release_page(pp, virt_to_page(data)); 3517 else 3518 dma_unmap_single_attrs(dev->dev.parent, dma_addr, 3519 bm_pool->buf_size, DMA_FROM_DEVICE, 3520 DMA_ATTR_SKIP_CPU_SYNC); 3521 3522 ps.rx_packets++; 3523 ps.rx_bytes += rx_bytes; 3524 3525 skb_reserve(skb, MVPP2_MH_SIZE + MVPP2_SKB_HEADROOM); 3526 skb_put(skb, rx_bytes); 3527 skb->protocol = eth_type_trans(skb, dev); 3528 mvpp2_rx_csum(port, rx_status, skb); 3529 3530 napi_gro_receive(napi, skb); 3531 continue; 3532 3533 err_drop_frame: 3534 dev->stats.rx_errors++; 3535 mvpp2_rx_error(port, rx_desc); 3536 /* Return the buffer to the pool */ 3537 mvpp2_bm_pool_put(port, pool, dma_addr, phys_addr); 3538 } 3539 3540 rcu_read_unlock(); 3541 3542 if (xdp_ret & MVPP2_XDP_REDIR) 3543 xdp_do_flush_map(); 3544 3545 if (ps.rx_packets) { 3546 struct mvpp2_pcpu_stats *stats = this_cpu_ptr(port->stats); 3547 3548 u64_stats_update_begin(&stats->syncp); 3549 stats->rx_packets += ps.rx_packets; 3550 stats->rx_bytes += ps.rx_bytes; 3551 /* xdp */ 3552 stats->xdp_redirect += ps.xdp_redirect; 3553 stats->xdp_pass += ps.xdp_pass; 3554 stats->xdp_drop += ps.xdp_drop; 3555 u64_stats_update_end(&stats->syncp); 3556 } 3557 3558 /* Update Rx queue management counters */ 3559 wmb(); 3560 mvpp2_rxq_status_update(port, rxq->id, rx_done, rx_done); 3561 3562 return rx_todo; 3563 } 3564 3565 static inline void 3566 tx_desc_unmap_put(struct mvpp2_port *port, struct mvpp2_tx_queue *txq, 3567 struct mvpp2_tx_desc *desc) 3568 { 3569 unsigned int thread = mvpp2_cpu_to_thread(port->priv, smp_processor_id()); 3570 struct mvpp2_txq_pcpu *txq_pcpu = per_cpu_ptr(txq->pcpu, thread); 3571 3572 dma_addr_t buf_dma_addr = 3573 mvpp2_txdesc_dma_addr_get(port, desc); 3574 size_t buf_sz = 3575 mvpp2_txdesc_size_get(port, desc); 3576 if (!IS_TSO_HEADER(txq_pcpu, buf_dma_addr)) 3577 dma_unmap_single(port->dev->dev.parent, buf_dma_addr, 3578 buf_sz, DMA_TO_DEVICE); 3579 mvpp2_txq_desc_put(txq); 3580 } 3581 3582 /* Handle tx fragmentation processing */ 3583 static int mvpp2_tx_frag_process(struct mvpp2_port *port, struct sk_buff *skb, 3584 struct mvpp2_tx_queue *aggr_txq, 3585 struct mvpp2_tx_queue *txq) 3586 { 3587 unsigned int thread = mvpp2_cpu_to_thread(port->priv, smp_processor_id()); 3588 struct mvpp2_txq_pcpu *txq_pcpu = per_cpu_ptr(txq->pcpu, thread); 3589 struct mvpp2_tx_desc *tx_desc; 3590 int i; 3591 dma_addr_t buf_dma_addr; 3592 3593 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { 3594 skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; 3595 void *addr = skb_frag_address(frag); 3596 3597 tx_desc = mvpp2_txq_next_desc_get(aggr_txq); 3598 mvpp2_txdesc_txq_set(port, tx_desc, txq->id); 3599 mvpp2_txdesc_size_set(port, tx_desc, skb_frag_size(frag)); 3600 3601 buf_dma_addr = dma_map_single(port->dev->dev.parent, addr, 3602 skb_frag_size(frag), 3603 DMA_TO_DEVICE); 3604 if (dma_mapping_error(port->dev->dev.parent, buf_dma_addr)) { 3605 mvpp2_txq_desc_put(txq); 3606 goto cleanup; 3607 } 3608 3609 mvpp2_txdesc_dma_addr_set(port, tx_desc, buf_dma_addr); 3610 3611 if (i == (skb_shinfo(skb)->nr_frags - 1)) { 3612 /* Last descriptor */ 3613 mvpp2_txdesc_cmd_set(port, tx_desc, 3614 MVPP2_TXD_L_DESC); 3615 mvpp2_txq_inc_put(port, txq_pcpu, skb, tx_desc, MVPP2_TYPE_SKB); 3616 } else { 3617 /* Descriptor in the middle: Not First, Not Last */ 3618 mvpp2_txdesc_cmd_set(port, tx_desc, 0); 3619 mvpp2_txq_inc_put(port, txq_pcpu, NULL, tx_desc, MVPP2_TYPE_SKB); 3620 } 3621 } 3622 3623 return 0; 3624 cleanup: 3625 /* Release all descriptors that were used to map fragments of 3626 * this packet, as well as the corresponding DMA mappings 3627 */ 3628 for (i = i - 1; i >= 0; i--) { 3629 tx_desc = txq->descs + i; 3630 tx_desc_unmap_put(port, txq, tx_desc); 3631 } 3632 3633 return -ENOMEM; 3634 } 3635 3636 static inline void mvpp2_tso_put_hdr(struct sk_buff *skb, 3637 struct net_device *dev, 3638 struct mvpp2_tx_queue *txq, 3639 struct mvpp2_tx_queue *aggr_txq, 3640 struct mvpp2_txq_pcpu *txq_pcpu, 3641 int hdr_sz) 3642 { 3643 struct mvpp2_port *port = netdev_priv(dev); 3644 struct mvpp2_tx_desc *tx_desc = mvpp2_txq_next_desc_get(aggr_txq); 3645 dma_addr_t addr; 3646 3647 mvpp2_txdesc_txq_set(port, tx_desc, txq->id); 3648 mvpp2_txdesc_size_set(port, tx_desc, hdr_sz); 3649 3650 addr = txq_pcpu->tso_headers_dma + 3651 txq_pcpu->txq_put_index * TSO_HEADER_SIZE; 3652 mvpp2_txdesc_dma_addr_set(port, tx_desc, addr); 3653 3654 mvpp2_txdesc_cmd_set(port, tx_desc, mvpp2_skb_tx_csum(port, skb) | 3655 MVPP2_TXD_F_DESC | 3656 MVPP2_TXD_PADDING_DISABLE); 3657 mvpp2_txq_inc_put(port, txq_pcpu, NULL, tx_desc, MVPP2_TYPE_SKB); 3658 } 3659 3660 static inline int mvpp2_tso_put_data(struct sk_buff *skb, 3661 struct net_device *dev, struct tso_t *tso, 3662 struct mvpp2_tx_queue *txq, 3663 struct mvpp2_tx_queue *aggr_txq, 3664 struct mvpp2_txq_pcpu *txq_pcpu, 3665 int sz, bool left, bool last) 3666 { 3667 struct mvpp2_port *port = netdev_priv(dev); 3668 struct mvpp2_tx_desc *tx_desc = mvpp2_txq_next_desc_get(aggr_txq); 3669 dma_addr_t buf_dma_addr; 3670 3671 mvpp2_txdesc_txq_set(port, tx_desc, txq->id); 3672 mvpp2_txdesc_size_set(port, tx_desc, sz); 3673 3674 buf_dma_addr = dma_map_single(dev->dev.parent, tso->data, sz, 3675 DMA_TO_DEVICE); 3676 if (unlikely(dma_mapping_error(dev->dev.parent, buf_dma_addr))) { 3677 mvpp2_txq_desc_put(txq); 3678 return -ENOMEM; 3679 } 3680 3681 mvpp2_txdesc_dma_addr_set(port, tx_desc, buf_dma_addr); 3682 3683 if (!left) { 3684 mvpp2_txdesc_cmd_set(port, tx_desc, MVPP2_TXD_L_DESC); 3685 if (last) { 3686 mvpp2_txq_inc_put(port, txq_pcpu, skb, tx_desc, MVPP2_TYPE_SKB); 3687 return 0; 3688 } 3689 } else { 3690 mvpp2_txdesc_cmd_set(port, tx_desc, 0); 3691 } 3692 3693 mvpp2_txq_inc_put(port, txq_pcpu, NULL, tx_desc, MVPP2_TYPE_SKB); 3694 return 0; 3695 } 3696 3697 static int mvpp2_tx_tso(struct sk_buff *skb, struct net_device *dev, 3698 struct mvpp2_tx_queue *txq, 3699 struct mvpp2_tx_queue *aggr_txq, 3700 struct mvpp2_txq_pcpu *txq_pcpu) 3701 { 3702 struct mvpp2_port *port = netdev_priv(dev); 3703 int hdr_sz, i, len, descs = 0; 3704 struct tso_t tso; 3705 3706 /* Check number of available descriptors */ 3707 if (mvpp2_aggr_desc_num_check(port, aggr_txq, tso_count_descs(skb)) || 3708 mvpp2_txq_reserved_desc_num_proc(port, txq, txq_pcpu, 3709 tso_count_descs(skb))) 3710 return 0; 3711 3712 hdr_sz = tso_start(skb, &tso); 3713 3714 len = skb->len - hdr_sz; 3715 while (len > 0) { 3716 int left = min_t(int, skb_shinfo(skb)->gso_size, len); 3717 char *hdr = txq_pcpu->tso_headers + 3718 txq_pcpu->txq_put_index * TSO_HEADER_SIZE; 3719 3720 len -= left; 3721 descs++; 3722 3723 tso_build_hdr(skb, hdr, &tso, left, len == 0); 3724 mvpp2_tso_put_hdr(skb, dev, txq, aggr_txq, txq_pcpu, hdr_sz); 3725 3726 while (left > 0) { 3727 int sz = min_t(int, tso.size, left); 3728 left -= sz; 3729 descs++; 3730 3731 if (mvpp2_tso_put_data(skb, dev, &tso, txq, aggr_txq, 3732 txq_pcpu, sz, left, len == 0)) 3733 goto release; 3734 tso_build_data(skb, &tso, sz); 3735 } 3736 } 3737 3738 return descs; 3739 3740 release: 3741 for (i = descs - 1; i >= 0; i--) { 3742 struct mvpp2_tx_desc *tx_desc = txq->descs + i; 3743 tx_desc_unmap_put(port, txq, tx_desc); 3744 } 3745 return 0; 3746 } 3747 3748 /* Main tx processing */ 3749 static netdev_tx_t mvpp2_tx(struct sk_buff *skb, struct net_device *dev) 3750 { 3751 struct mvpp2_port *port = netdev_priv(dev); 3752 struct mvpp2_tx_queue *txq, *aggr_txq; 3753 struct mvpp2_txq_pcpu *txq_pcpu; 3754 struct mvpp2_tx_desc *tx_desc; 3755 dma_addr_t buf_dma_addr; 3756 unsigned long flags = 0; 3757 unsigned int thread; 3758 int frags = 0; 3759 u16 txq_id; 3760 u32 tx_cmd; 3761 3762 thread = mvpp2_cpu_to_thread(port->priv, smp_processor_id()); 3763 3764 txq_id = skb_get_queue_mapping(skb); 3765 txq = port->txqs[txq_id]; 3766 txq_pcpu = per_cpu_ptr(txq->pcpu, thread); 3767 aggr_txq = &port->priv->aggr_txqs[thread]; 3768 3769 if (test_bit(thread, &port->priv->lock_map)) 3770 spin_lock_irqsave(&port->tx_lock[thread], flags); 3771 3772 if (skb_is_gso(skb)) { 3773 frags = mvpp2_tx_tso(skb, dev, txq, aggr_txq, txq_pcpu); 3774 goto out; 3775 } 3776 frags = skb_shinfo(skb)->nr_frags + 1; 3777 3778 /* Check number of available descriptors */ 3779 if (mvpp2_aggr_desc_num_check(port, aggr_txq, frags) || 3780 mvpp2_txq_reserved_desc_num_proc(port, txq, txq_pcpu, frags)) { 3781 frags = 0; 3782 goto out; 3783 } 3784 3785 /* Get a descriptor for the first part of the packet */ 3786 tx_desc = mvpp2_txq_next_desc_get(aggr_txq); 3787 mvpp2_txdesc_txq_set(port, tx_desc, txq->id); 3788 mvpp2_txdesc_size_set(port, tx_desc, skb_headlen(skb)); 3789 3790 buf_dma_addr = dma_map_single(dev->dev.parent, skb->data, 3791 skb_headlen(skb), DMA_TO_DEVICE); 3792 if (unlikely(dma_mapping_error(dev->dev.parent, buf_dma_addr))) { 3793 mvpp2_txq_desc_put(txq); 3794 frags = 0; 3795 goto out; 3796 } 3797 3798 mvpp2_txdesc_dma_addr_set(port, tx_desc, buf_dma_addr); 3799 3800 tx_cmd = mvpp2_skb_tx_csum(port, skb); 3801 3802 if (frags == 1) { 3803 /* First and Last descriptor */ 3804 tx_cmd |= MVPP2_TXD_F_DESC | MVPP2_TXD_L_DESC; 3805 mvpp2_txdesc_cmd_set(port, tx_desc, tx_cmd); 3806 mvpp2_txq_inc_put(port, txq_pcpu, skb, tx_desc, MVPP2_TYPE_SKB); 3807 } else { 3808 /* First but not Last */ 3809 tx_cmd |= MVPP2_TXD_F_DESC | MVPP2_TXD_PADDING_DISABLE; 3810 mvpp2_txdesc_cmd_set(port, tx_desc, tx_cmd); 3811 mvpp2_txq_inc_put(port, txq_pcpu, NULL, tx_desc, MVPP2_TYPE_SKB); 3812 3813 /* Continue with other skb fragments */ 3814 if (mvpp2_tx_frag_process(port, skb, aggr_txq, txq)) { 3815 tx_desc_unmap_put(port, txq, tx_desc); 3816 frags = 0; 3817 } 3818 } 3819 3820 out: 3821 if (frags > 0) { 3822 struct mvpp2_pcpu_stats *stats = per_cpu_ptr(port->stats, thread); 3823 struct netdev_queue *nq = netdev_get_tx_queue(dev, txq_id); 3824 3825 txq_pcpu->reserved_num -= frags; 3826 txq_pcpu->count += frags; 3827 aggr_txq->count += frags; 3828 3829 /* Enable transmit */ 3830 wmb(); 3831 mvpp2_aggr_txq_pend_desc_add(port, frags); 3832 3833 if (txq_pcpu->count >= txq_pcpu->stop_threshold) 3834 netif_tx_stop_queue(nq); 3835 3836 u64_stats_update_begin(&stats->syncp); 3837 stats->tx_packets++; 3838 stats->tx_bytes += skb->len; 3839 u64_stats_update_end(&stats->syncp); 3840 } else { 3841 dev->stats.tx_dropped++; 3842 dev_kfree_skb_any(skb); 3843 } 3844 3845 /* Finalize TX processing */ 3846 if (!port->has_tx_irqs && txq_pcpu->count >= txq->done_pkts_coal) 3847 mvpp2_txq_done(port, txq, txq_pcpu); 3848 3849 /* Set the timer in case not all frags were processed */ 3850 if (!port->has_tx_irqs && txq_pcpu->count <= frags && 3851 txq_pcpu->count > 0) { 3852 struct mvpp2_port_pcpu *port_pcpu = per_cpu_ptr(port->pcpu, thread); 3853 3854 if (!port_pcpu->timer_scheduled) { 3855 port_pcpu->timer_scheduled = true; 3856 hrtimer_start(&port_pcpu->tx_done_timer, 3857 MVPP2_TXDONE_HRTIMER_PERIOD_NS, 3858 HRTIMER_MODE_REL_PINNED_SOFT); 3859 } 3860 } 3861 3862 if (test_bit(thread, &port->priv->lock_map)) 3863 spin_unlock_irqrestore(&port->tx_lock[thread], flags); 3864 3865 return NETDEV_TX_OK; 3866 } 3867 3868 static inline void mvpp2_cause_error(struct net_device *dev, int cause) 3869 { 3870 if (cause & MVPP2_CAUSE_FCS_ERR_MASK) 3871 netdev_err(dev, "FCS error\n"); 3872 if (cause & MVPP2_CAUSE_RX_FIFO_OVERRUN_MASK) 3873 netdev_err(dev, "rx fifo overrun error\n"); 3874 if (cause & MVPP2_CAUSE_TX_FIFO_UNDERRUN_MASK) 3875 netdev_err(dev, "tx fifo underrun error\n"); 3876 } 3877 3878 static int mvpp2_poll(struct napi_struct *napi, int budget) 3879 { 3880 u32 cause_rx_tx, cause_rx, cause_tx, cause_misc; 3881 int rx_done = 0; 3882 struct mvpp2_port *port = netdev_priv(napi->dev); 3883 struct mvpp2_queue_vector *qv; 3884 unsigned int thread = mvpp2_cpu_to_thread(port->priv, smp_processor_id()); 3885 3886 qv = container_of(napi, struct mvpp2_queue_vector, napi); 3887 3888 /* Rx/Tx cause register 3889 * 3890 * Bits 0-15: each bit indicates received packets on the Rx queue 3891 * (bit 0 is for Rx queue 0). 3892 * 3893 * Bits 16-23: each bit indicates transmitted packets on the Tx queue 3894 * (bit 16 is for Tx queue 0). 3895 * 3896 * Each CPU has its own Rx/Tx cause register 3897 */ 3898 cause_rx_tx = mvpp2_thread_read_relaxed(port->priv, qv->sw_thread_id, 3899 MVPP2_ISR_RX_TX_CAUSE_REG(port->id)); 3900 3901 cause_misc = cause_rx_tx & MVPP2_CAUSE_MISC_SUM_MASK; 3902 if (cause_misc) { 3903 mvpp2_cause_error(port->dev, cause_misc); 3904 3905 /* Clear the cause register */ 3906 mvpp2_write(port->priv, MVPP2_ISR_MISC_CAUSE_REG, 0); 3907 mvpp2_thread_write(port->priv, thread, 3908 MVPP2_ISR_RX_TX_CAUSE_REG(port->id), 3909 cause_rx_tx & ~MVPP2_CAUSE_MISC_SUM_MASK); 3910 } 3911 3912 if (port->has_tx_irqs) { 3913 cause_tx = cause_rx_tx & MVPP2_CAUSE_TXQ_OCCUP_DESC_ALL_MASK; 3914 if (cause_tx) { 3915 cause_tx >>= MVPP2_CAUSE_TXQ_OCCUP_DESC_ALL_OFFSET; 3916 mvpp2_tx_done(port, cause_tx, qv->sw_thread_id); 3917 } 3918 } 3919 3920 /* Process RX packets */ 3921 cause_rx = cause_rx_tx & 3922 MVPP2_CAUSE_RXQ_OCCUP_DESC_ALL_MASK(port->priv->hw_version); 3923 cause_rx <<= qv->first_rxq; 3924 cause_rx |= qv->pending_cause_rx; 3925 while (cause_rx && budget > 0) { 3926 int count; 3927 struct mvpp2_rx_queue *rxq; 3928 3929 rxq = mvpp2_get_rx_queue(port, cause_rx); 3930 if (!rxq) 3931 break; 3932 3933 count = mvpp2_rx(port, napi, budget, rxq); 3934 rx_done += count; 3935 budget -= count; 3936 if (budget > 0) { 3937 /* Clear the bit associated to this Rx queue 3938 * so that next iteration will continue from 3939 * the next Rx queue. 3940 */ 3941 cause_rx &= ~(1 << rxq->logic_rxq); 3942 } 3943 } 3944 3945 if (budget > 0) { 3946 cause_rx = 0; 3947 napi_complete_done(napi, rx_done); 3948 3949 mvpp2_qvec_interrupt_enable(qv); 3950 } 3951 qv->pending_cause_rx = cause_rx; 3952 return rx_done; 3953 } 3954 3955 static void mvpp22_mode_reconfigure(struct mvpp2_port *port) 3956 { 3957 u32 ctrl3; 3958 3959 /* Set the GMAC & XLG MAC in reset */ 3960 mvpp2_mac_reset_assert(port); 3961 3962 /* Set the MPCS and XPCS in reset */ 3963 mvpp22_pcs_reset_assert(port); 3964 3965 /* comphy reconfiguration */ 3966 mvpp22_comphy_init(port); 3967 3968 /* gop reconfiguration */ 3969 mvpp22_gop_init(port); 3970 3971 mvpp22_pcs_reset_deassert(port); 3972 3973 if (mvpp2_port_supports_xlg(port)) { 3974 ctrl3 = readl(port->base + MVPP22_XLG_CTRL3_REG); 3975 ctrl3 &= ~MVPP22_XLG_CTRL3_MACMODESELECT_MASK; 3976 3977 if (mvpp2_is_xlg(port->phy_interface)) 3978 ctrl3 |= MVPP22_XLG_CTRL3_MACMODESELECT_10G; 3979 else 3980 ctrl3 |= MVPP22_XLG_CTRL3_MACMODESELECT_GMAC; 3981 3982 writel(ctrl3, port->base + MVPP22_XLG_CTRL3_REG); 3983 } 3984 3985 if (mvpp2_port_supports_xlg(port) && mvpp2_is_xlg(port->phy_interface)) 3986 mvpp2_xlg_max_rx_size_set(port); 3987 else 3988 mvpp2_gmac_max_rx_size_set(port); 3989 } 3990 3991 /* Set hw internals when starting port */ 3992 static void mvpp2_start_dev(struct mvpp2_port *port) 3993 { 3994 int i; 3995 3996 mvpp2_txp_max_tx_size_set(port); 3997 3998 for (i = 0; i < port->nqvecs; i++) 3999 napi_enable(&port->qvecs[i].napi); 4000 4001 /* Enable interrupts on all threads */ 4002 mvpp2_interrupts_enable(port); 4003 4004 if (port->priv->hw_version == MVPP22) 4005 mvpp22_mode_reconfigure(port); 4006 4007 if (port->phylink) { 4008 phylink_start(port->phylink); 4009 } else { 4010 /* Phylink isn't used as of now for ACPI, so the MAC has to be 4011 * configured manually when the interface is started. This will 4012 * be removed as soon as the phylink ACPI support lands in. 4013 */ 4014 struct phylink_link_state state = { 4015 .interface = port->phy_interface, 4016 }; 4017 mvpp2_mac_config(&port->phylink_config, MLO_AN_INBAND, &state); 4018 mvpp2_mac_link_up(&port->phylink_config, NULL, 4019 MLO_AN_INBAND, port->phy_interface, 4020 SPEED_UNKNOWN, DUPLEX_UNKNOWN, false, false); 4021 } 4022 4023 netif_tx_start_all_queues(port->dev); 4024 4025 clear_bit(0, &port->state); 4026 } 4027 4028 /* Set hw internals when stopping port */ 4029 static void mvpp2_stop_dev(struct mvpp2_port *port) 4030 { 4031 int i; 4032 4033 set_bit(0, &port->state); 4034 4035 /* Disable interrupts on all threads */ 4036 mvpp2_interrupts_disable(port); 4037 4038 for (i = 0; i < port->nqvecs; i++) 4039 napi_disable(&port->qvecs[i].napi); 4040 4041 if (port->phylink) 4042 phylink_stop(port->phylink); 4043 phy_power_off(port->comphy); 4044 } 4045 4046 static int mvpp2_check_ringparam_valid(struct net_device *dev, 4047 struct ethtool_ringparam *ring) 4048 { 4049 u16 new_rx_pending = ring->rx_pending; 4050 u16 new_tx_pending = ring->tx_pending; 4051 4052 if (ring->rx_pending == 0 || ring->tx_pending == 0) 4053 return -EINVAL; 4054 4055 if (ring->rx_pending > MVPP2_MAX_RXD_MAX) 4056 new_rx_pending = MVPP2_MAX_RXD_MAX; 4057 else if (!IS_ALIGNED(ring->rx_pending, 16)) 4058 new_rx_pending = ALIGN(ring->rx_pending, 16); 4059 4060 if (ring->tx_pending > MVPP2_MAX_TXD_MAX) 4061 new_tx_pending = MVPP2_MAX_TXD_MAX; 4062 else if (!IS_ALIGNED(ring->tx_pending, 32)) 4063 new_tx_pending = ALIGN(ring->tx_pending, 32); 4064 4065 /* The Tx ring size cannot be smaller than the minimum number of 4066 * descriptors needed for TSO. 4067 */ 4068 if (new_tx_pending < MVPP2_MAX_SKB_DESCS) 4069 new_tx_pending = ALIGN(MVPP2_MAX_SKB_DESCS, 32); 4070 4071 if (ring->rx_pending != new_rx_pending) { 4072 netdev_info(dev, "illegal Rx ring size value %d, round to %d\n", 4073 ring->rx_pending, new_rx_pending); 4074 ring->rx_pending = new_rx_pending; 4075 } 4076 4077 if (ring->tx_pending != new_tx_pending) { 4078 netdev_info(dev, "illegal Tx ring size value %d, round to %d\n", 4079 ring->tx_pending, new_tx_pending); 4080 ring->tx_pending = new_tx_pending; 4081 } 4082 4083 return 0; 4084 } 4085 4086 static void mvpp21_get_mac_address(struct mvpp2_port *port, unsigned char *addr) 4087 { 4088 u32 mac_addr_l, mac_addr_m, mac_addr_h; 4089 4090 mac_addr_l = readl(port->base + MVPP2_GMAC_CTRL_1_REG); 4091 mac_addr_m = readl(port->priv->lms_base + MVPP2_SRC_ADDR_MIDDLE); 4092 mac_addr_h = readl(port->priv->lms_base + MVPP2_SRC_ADDR_HIGH); 4093 addr[0] = (mac_addr_h >> 24) & 0xFF; 4094 addr[1] = (mac_addr_h >> 16) & 0xFF; 4095 addr[2] = (mac_addr_h >> 8) & 0xFF; 4096 addr[3] = mac_addr_h & 0xFF; 4097 addr[4] = mac_addr_m & 0xFF; 4098 addr[5] = (mac_addr_l >> MVPP2_GMAC_SA_LOW_OFFS) & 0xFF; 4099 } 4100 4101 static int mvpp2_irqs_init(struct mvpp2_port *port) 4102 { 4103 int err, i; 4104 4105 for (i = 0; i < port->nqvecs; i++) { 4106 struct mvpp2_queue_vector *qv = port->qvecs + i; 4107 4108 if (qv->type == MVPP2_QUEUE_VECTOR_PRIVATE) { 4109 qv->mask = kzalloc(cpumask_size(), GFP_KERNEL); 4110 if (!qv->mask) { 4111 err = -ENOMEM; 4112 goto err; 4113 } 4114 4115 irq_set_status_flags(qv->irq, IRQ_NO_BALANCING); 4116 } 4117 4118 err = request_irq(qv->irq, mvpp2_isr, 0, port->dev->name, qv); 4119 if (err) 4120 goto err; 4121 4122 if (qv->type == MVPP2_QUEUE_VECTOR_PRIVATE) { 4123 unsigned int cpu; 4124 4125 for_each_present_cpu(cpu) { 4126 if (mvpp2_cpu_to_thread(port->priv, cpu) == 4127 qv->sw_thread_id) 4128 cpumask_set_cpu(cpu, qv->mask); 4129 } 4130 4131 irq_set_affinity_hint(qv->irq, qv->mask); 4132 } 4133 } 4134 4135 return 0; 4136 err: 4137 for (i = 0; i < port->nqvecs; i++) { 4138 struct mvpp2_queue_vector *qv = port->qvecs + i; 4139 4140 irq_set_affinity_hint(qv->irq, NULL); 4141 kfree(qv->mask); 4142 qv->mask = NULL; 4143 free_irq(qv->irq, qv); 4144 } 4145 4146 return err; 4147 } 4148 4149 static void mvpp2_irqs_deinit(struct mvpp2_port *port) 4150 { 4151 int i; 4152 4153 for (i = 0; i < port->nqvecs; i++) { 4154 struct mvpp2_queue_vector *qv = port->qvecs + i; 4155 4156 irq_set_affinity_hint(qv->irq, NULL); 4157 kfree(qv->mask); 4158 qv->mask = NULL; 4159 irq_clear_status_flags(qv->irq, IRQ_NO_BALANCING); 4160 free_irq(qv->irq, qv); 4161 } 4162 } 4163 4164 static bool mvpp22_rss_is_supported(void) 4165 { 4166 return queue_mode == MVPP2_QDIST_MULTI_MODE; 4167 } 4168 4169 static int mvpp2_open(struct net_device *dev) 4170 { 4171 struct mvpp2_port *port = netdev_priv(dev); 4172 struct mvpp2 *priv = port->priv; 4173 unsigned char mac_bcast[ETH_ALEN] = { 4174 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; 4175 bool valid = false; 4176 int err; 4177 4178 err = mvpp2_prs_mac_da_accept(port, mac_bcast, true); 4179 if (err) { 4180 netdev_err(dev, "mvpp2_prs_mac_da_accept BC failed\n"); 4181 return err; 4182 } 4183 err = mvpp2_prs_mac_da_accept(port, dev->dev_addr, true); 4184 if (err) { 4185 netdev_err(dev, "mvpp2_prs_mac_da_accept own addr failed\n"); 4186 return err; 4187 } 4188 err = mvpp2_prs_tag_mode_set(port->priv, port->id, MVPP2_TAG_TYPE_MH); 4189 if (err) { 4190 netdev_err(dev, "mvpp2_prs_tag_mode_set failed\n"); 4191 return err; 4192 } 4193 err = mvpp2_prs_def_flow(port); 4194 if (err) { 4195 netdev_err(dev, "mvpp2_prs_def_flow failed\n"); 4196 return err; 4197 } 4198 4199 /* Allocate the Rx/Tx queues */ 4200 err = mvpp2_setup_rxqs(port); 4201 if (err) { 4202 netdev_err(port->dev, "cannot allocate Rx queues\n"); 4203 return err; 4204 } 4205 4206 err = mvpp2_setup_txqs(port); 4207 if (err) { 4208 netdev_err(port->dev, "cannot allocate Tx queues\n"); 4209 goto err_cleanup_rxqs; 4210 } 4211 4212 err = mvpp2_irqs_init(port); 4213 if (err) { 4214 netdev_err(port->dev, "cannot init IRQs\n"); 4215 goto err_cleanup_txqs; 4216 } 4217 4218 /* Phylink isn't supported yet in ACPI mode */ 4219 if (port->of_node) { 4220 err = phylink_of_phy_connect(port->phylink, port->of_node, 0); 4221 if (err) { 4222 netdev_err(port->dev, "could not attach PHY (%d)\n", 4223 err); 4224 goto err_free_irq; 4225 } 4226 4227 valid = true; 4228 } 4229 4230 if (priv->hw_version == MVPP22 && port->link_irq) { 4231 err = request_irq(port->link_irq, mvpp2_link_status_isr, 0, 4232 dev->name, port); 4233 if (err) { 4234 netdev_err(port->dev, "cannot request link IRQ %d\n", 4235 port->link_irq); 4236 goto err_free_irq; 4237 } 4238 4239 mvpp22_gop_setup_irq(port); 4240 4241 /* In default link is down */ 4242 netif_carrier_off(port->dev); 4243 4244 valid = true; 4245 } else { 4246 port->link_irq = 0; 4247 } 4248 4249 if (!valid) { 4250 netdev_err(port->dev, 4251 "invalid configuration: no dt or link IRQ"); 4252 goto err_free_irq; 4253 } 4254 4255 /* Unmask interrupts on all CPUs */ 4256 on_each_cpu(mvpp2_interrupts_unmask, port, 1); 4257 mvpp2_shared_interrupt_mask_unmask(port, false); 4258 4259 mvpp2_start_dev(port); 4260 4261 /* Start hardware statistics gathering */ 4262 queue_delayed_work(priv->stats_queue, &port->stats_work, 4263 MVPP2_MIB_COUNTERS_STATS_DELAY); 4264 4265 return 0; 4266 4267 err_free_irq: 4268 mvpp2_irqs_deinit(port); 4269 err_cleanup_txqs: 4270 mvpp2_cleanup_txqs(port); 4271 err_cleanup_rxqs: 4272 mvpp2_cleanup_rxqs(port); 4273 return err; 4274 } 4275 4276 static int mvpp2_stop(struct net_device *dev) 4277 { 4278 struct mvpp2_port *port = netdev_priv(dev); 4279 struct mvpp2_port_pcpu *port_pcpu; 4280 unsigned int thread; 4281 4282 mvpp2_stop_dev(port); 4283 4284 /* Mask interrupts on all threads */ 4285 on_each_cpu(mvpp2_interrupts_mask, port, 1); 4286 mvpp2_shared_interrupt_mask_unmask(port, true); 4287 4288 if (port->phylink) 4289 phylink_disconnect_phy(port->phylink); 4290 if (port->link_irq) 4291 free_irq(port->link_irq, port); 4292 4293 mvpp2_irqs_deinit(port); 4294 if (!port->has_tx_irqs) { 4295 for (thread = 0; thread < port->priv->nthreads; thread++) { 4296 port_pcpu = per_cpu_ptr(port->pcpu, thread); 4297 4298 hrtimer_cancel(&port_pcpu->tx_done_timer); 4299 port_pcpu->timer_scheduled = false; 4300 } 4301 } 4302 mvpp2_cleanup_rxqs(port); 4303 mvpp2_cleanup_txqs(port); 4304 4305 cancel_delayed_work_sync(&port->stats_work); 4306 4307 mvpp2_mac_reset_assert(port); 4308 mvpp22_pcs_reset_assert(port); 4309 4310 return 0; 4311 } 4312 4313 static int mvpp2_prs_mac_da_accept_list(struct mvpp2_port *port, 4314 struct netdev_hw_addr_list *list) 4315 { 4316 struct netdev_hw_addr *ha; 4317 int ret; 4318 4319 netdev_hw_addr_list_for_each(ha, list) { 4320 ret = mvpp2_prs_mac_da_accept(port, ha->addr, true); 4321 if (ret) 4322 return ret; 4323 } 4324 4325 return 0; 4326 } 4327 4328 static void mvpp2_set_rx_promisc(struct mvpp2_port *port, bool enable) 4329 { 4330 if (!enable && (port->dev->features & NETIF_F_HW_VLAN_CTAG_FILTER)) 4331 mvpp2_prs_vid_enable_filtering(port); 4332 else 4333 mvpp2_prs_vid_disable_filtering(port); 4334 4335 mvpp2_prs_mac_promisc_set(port->priv, port->id, 4336 MVPP2_PRS_L2_UNI_CAST, enable); 4337 4338 mvpp2_prs_mac_promisc_set(port->priv, port->id, 4339 MVPP2_PRS_L2_MULTI_CAST, enable); 4340 } 4341 4342 static void mvpp2_set_rx_mode(struct net_device *dev) 4343 { 4344 struct mvpp2_port *port = netdev_priv(dev); 4345 4346 /* Clear the whole UC and MC list */ 4347 mvpp2_prs_mac_del_all(port); 4348 4349 if (dev->flags & IFF_PROMISC) { 4350 mvpp2_set_rx_promisc(port, true); 4351 return; 4352 } 4353 4354 mvpp2_set_rx_promisc(port, false); 4355 4356 if (netdev_uc_count(dev) > MVPP2_PRS_MAC_UC_FILT_MAX || 4357 mvpp2_prs_mac_da_accept_list(port, &dev->uc)) 4358 mvpp2_prs_mac_promisc_set(port->priv, port->id, 4359 MVPP2_PRS_L2_UNI_CAST, true); 4360 4361 if (dev->flags & IFF_ALLMULTI) { 4362 mvpp2_prs_mac_promisc_set(port->priv, port->id, 4363 MVPP2_PRS_L2_MULTI_CAST, true); 4364 return; 4365 } 4366 4367 if (netdev_mc_count(dev) > MVPP2_PRS_MAC_MC_FILT_MAX || 4368 mvpp2_prs_mac_da_accept_list(port, &dev->mc)) 4369 mvpp2_prs_mac_promisc_set(port->priv, port->id, 4370 MVPP2_PRS_L2_MULTI_CAST, true); 4371 } 4372 4373 static int mvpp2_set_mac_address(struct net_device *dev, void *p) 4374 { 4375 const struct sockaddr *addr = p; 4376 int err; 4377 4378 if (!is_valid_ether_addr(addr->sa_data)) 4379 return -EADDRNOTAVAIL; 4380 4381 err = mvpp2_prs_update_mac_da(dev, addr->sa_data); 4382 if (err) { 4383 /* Reconfigure parser accept the original MAC address */ 4384 mvpp2_prs_update_mac_da(dev, dev->dev_addr); 4385 netdev_err(dev, "failed to change MAC address\n"); 4386 } 4387 return err; 4388 } 4389 4390 /* Shut down all the ports, reconfigure the pools as percpu or shared, 4391 * then bring up again all ports. 4392 */ 4393 static int mvpp2_bm_switch_buffers(struct mvpp2 *priv, bool percpu) 4394 { 4395 int numbufs = MVPP2_BM_POOLS_NUM, i; 4396 struct mvpp2_port *port = NULL; 4397 bool status[MVPP2_MAX_PORTS]; 4398 4399 for (i = 0; i < priv->port_count; i++) { 4400 port = priv->port_list[i]; 4401 status[i] = netif_running(port->dev); 4402 if (status[i]) 4403 mvpp2_stop(port->dev); 4404 } 4405 4406 /* nrxqs is the same for all ports */ 4407 if (priv->percpu_pools) 4408 numbufs = port->nrxqs * 2; 4409 4410 for (i = 0; i < numbufs; i++) 4411 mvpp2_bm_pool_destroy(port->dev->dev.parent, priv, &priv->bm_pools[i]); 4412 4413 devm_kfree(port->dev->dev.parent, priv->bm_pools); 4414 priv->percpu_pools = percpu; 4415 mvpp2_bm_init(port->dev->dev.parent, priv); 4416 4417 for (i = 0; i < priv->port_count; i++) { 4418 port = priv->port_list[i]; 4419 mvpp2_swf_bm_pool_init(port); 4420 if (status[i]) 4421 mvpp2_open(port->dev); 4422 } 4423 4424 return 0; 4425 } 4426 4427 static int mvpp2_change_mtu(struct net_device *dev, int mtu) 4428 { 4429 struct mvpp2_port *port = netdev_priv(dev); 4430 bool running = netif_running(dev); 4431 struct mvpp2 *priv = port->priv; 4432 int err; 4433 4434 if (!IS_ALIGNED(MVPP2_RX_PKT_SIZE(mtu), 8)) { 4435 netdev_info(dev, "illegal MTU value %d, round to %d\n", mtu, 4436 ALIGN(MVPP2_RX_PKT_SIZE(mtu), 8)); 4437 mtu = ALIGN(MVPP2_RX_PKT_SIZE(mtu), 8); 4438 } 4439 4440 if (MVPP2_RX_PKT_SIZE(mtu) > MVPP2_BM_LONG_PKT_SIZE) { 4441 if (port->xdp_prog) { 4442 netdev_err(dev, "Jumbo frames are not supported with XDP\n"); 4443 return -EINVAL; 4444 } 4445 if (priv->percpu_pools) { 4446 netdev_warn(dev, "mtu %d too high, switching to shared buffers", mtu); 4447 mvpp2_bm_switch_buffers(priv, false); 4448 } 4449 } else { 4450 bool jumbo = false; 4451 int i; 4452 4453 for (i = 0; i < priv->port_count; i++) 4454 if (priv->port_list[i] != port && 4455 MVPP2_RX_PKT_SIZE(priv->port_list[i]->dev->mtu) > 4456 MVPP2_BM_LONG_PKT_SIZE) { 4457 jumbo = true; 4458 break; 4459 } 4460 4461 /* No port is using jumbo frames */ 4462 if (!jumbo) { 4463 dev_info(port->dev->dev.parent, 4464 "all ports have a low MTU, switching to per-cpu buffers"); 4465 mvpp2_bm_switch_buffers(priv, true); 4466 } 4467 } 4468 4469 if (running) 4470 mvpp2_stop_dev(port); 4471 4472 err = mvpp2_bm_update_mtu(dev, mtu); 4473 if (err) { 4474 netdev_err(dev, "failed to change MTU\n"); 4475 /* Reconfigure BM to the original MTU */ 4476 mvpp2_bm_update_mtu(dev, dev->mtu); 4477 } else { 4478 port->pkt_size = MVPP2_RX_PKT_SIZE(mtu); 4479 } 4480 4481 if (running) { 4482 mvpp2_start_dev(port); 4483 mvpp2_egress_enable(port); 4484 mvpp2_ingress_enable(port); 4485 } 4486 4487 return err; 4488 } 4489 4490 static int mvpp2_check_pagepool_dma(struct mvpp2_port *port) 4491 { 4492 enum dma_data_direction dma_dir = DMA_FROM_DEVICE; 4493 struct mvpp2 *priv = port->priv; 4494 int err = -1, i; 4495 4496 if (!priv->percpu_pools) 4497 return err; 4498 4499 if (!priv->page_pool[0]) 4500 return -ENOMEM; 4501 4502 for (i = 0; i < priv->port_count; i++) { 4503 port = priv->port_list[i]; 4504 if (port->xdp_prog) { 4505 dma_dir = DMA_BIDIRECTIONAL; 4506 break; 4507 } 4508 } 4509 4510 /* All pools are equal in terms of DMA direction */ 4511 if (priv->page_pool[0]->p.dma_dir != dma_dir) 4512 err = mvpp2_bm_switch_buffers(priv, true); 4513 4514 return err; 4515 } 4516 4517 static void 4518 mvpp2_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats) 4519 { 4520 struct mvpp2_port *port = netdev_priv(dev); 4521 unsigned int start; 4522 unsigned int cpu; 4523 4524 for_each_possible_cpu(cpu) { 4525 struct mvpp2_pcpu_stats *cpu_stats; 4526 u64 rx_packets; 4527 u64 rx_bytes; 4528 u64 tx_packets; 4529 u64 tx_bytes; 4530 4531 cpu_stats = per_cpu_ptr(port->stats, cpu); 4532 do { 4533 start = u64_stats_fetch_begin_irq(&cpu_stats->syncp); 4534 rx_packets = cpu_stats->rx_packets; 4535 rx_bytes = cpu_stats->rx_bytes; 4536 tx_packets = cpu_stats->tx_packets; 4537 tx_bytes = cpu_stats->tx_bytes; 4538 } while (u64_stats_fetch_retry_irq(&cpu_stats->syncp, start)); 4539 4540 stats->rx_packets += rx_packets; 4541 stats->rx_bytes += rx_bytes; 4542 stats->tx_packets += tx_packets; 4543 stats->tx_bytes += tx_bytes; 4544 } 4545 4546 stats->rx_errors = dev->stats.rx_errors; 4547 stats->rx_dropped = dev->stats.rx_dropped; 4548 stats->tx_dropped = dev->stats.tx_dropped; 4549 } 4550 4551 static int mvpp2_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) 4552 { 4553 struct mvpp2_port *port = netdev_priv(dev); 4554 4555 if (!port->phylink) 4556 return -ENOTSUPP; 4557 4558 return phylink_mii_ioctl(port->phylink, ifr, cmd); 4559 } 4560 4561 static int mvpp2_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid) 4562 { 4563 struct mvpp2_port *port = netdev_priv(dev); 4564 int ret; 4565 4566 ret = mvpp2_prs_vid_entry_add(port, vid); 4567 if (ret) 4568 netdev_err(dev, "rx-vlan-filter offloading cannot accept more than %d VIDs per port\n", 4569 MVPP2_PRS_VLAN_FILT_MAX - 1); 4570 return ret; 4571 } 4572 4573 static int mvpp2_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, u16 vid) 4574 { 4575 struct mvpp2_port *port = netdev_priv(dev); 4576 4577 mvpp2_prs_vid_entry_remove(port, vid); 4578 return 0; 4579 } 4580 4581 static int mvpp2_set_features(struct net_device *dev, 4582 netdev_features_t features) 4583 { 4584 netdev_features_t changed = dev->features ^ features; 4585 struct mvpp2_port *port = netdev_priv(dev); 4586 4587 if (changed & NETIF_F_HW_VLAN_CTAG_FILTER) { 4588 if (features & NETIF_F_HW_VLAN_CTAG_FILTER) { 4589 mvpp2_prs_vid_enable_filtering(port); 4590 } else { 4591 /* Invalidate all registered VID filters for this 4592 * port 4593 */ 4594 mvpp2_prs_vid_remove_all(port); 4595 4596 mvpp2_prs_vid_disable_filtering(port); 4597 } 4598 } 4599 4600 if (changed & NETIF_F_RXHASH) { 4601 if (features & NETIF_F_RXHASH) 4602 mvpp22_port_rss_enable(port); 4603 else 4604 mvpp22_port_rss_disable(port); 4605 } 4606 4607 return 0; 4608 } 4609 4610 static int mvpp2_xdp_setup(struct mvpp2_port *port, struct netdev_bpf *bpf) 4611 { 4612 struct bpf_prog *prog = bpf->prog, *old_prog; 4613 bool running = netif_running(port->dev); 4614 bool reset = !prog != !port->xdp_prog; 4615 4616 if (port->dev->mtu > ETH_DATA_LEN) { 4617 NL_SET_ERR_MSG_MOD(bpf->extack, "XDP is not supported with jumbo frames enabled"); 4618 return -EOPNOTSUPP; 4619 } 4620 4621 if (!port->priv->percpu_pools) { 4622 NL_SET_ERR_MSG_MOD(bpf->extack, "Per CPU Pools required for XDP"); 4623 return -EOPNOTSUPP; 4624 } 4625 4626 if (port->ntxqs < num_possible_cpus() * 2) { 4627 NL_SET_ERR_MSG_MOD(bpf->extack, "XDP_TX needs two TX queues per CPU"); 4628 return -EOPNOTSUPP; 4629 } 4630 4631 /* device is up and bpf is added/removed, must setup the RX queues */ 4632 if (running && reset) 4633 mvpp2_stop(port->dev); 4634 4635 old_prog = xchg(&port->xdp_prog, prog); 4636 if (old_prog) 4637 bpf_prog_put(old_prog); 4638 4639 /* bpf is just replaced, RXQ and MTU are already setup */ 4640 if (!reset) 4641 return 0; 4642 4643 /* device was up, restore the link */ 4644 if (running) 4645 mvpp2_open(port->dev); 4646 4647 /* Check Page Pool DMA Direction */ 4648 mvpp2_check_pagepool_dma(port); 4649 4650 return 0; 4651 } 4652 4653 static int mvpp2_xdp(struct net_device *dev, struct netdev_bpf *xdp) 4654 { 4655 struct mvpp2_port *port = netdev_priv(dev); 4656 4657 switch (xdp->command) { 4658 case XDP_SETUP_PROG: 4659 return mvpp2_xdp_setup(port, xdp); 4660 default: 4661 return -EINVAL; 4662 } 4663 } 4664 4665 /* Ethtool methods */ 4666 4667 static int mvpp2_ethtool_nway_reset(struct net_device *dev) 4668 { 4669 struct mvpp2_port *port = netdev_priv(dev); 4670 4671 if (!port->phylink) 4672 return -ENOTSUPP; 4673 4674 return phylink_ethtool_nway_reset(port->phylink); 4675 } 4676 4677 /* Set interrupt coalescing for ethtools */ 4678 static int mvpp2_ethtool_set_coalesce(struct net_device *dev, 4679 struct ethtool_coalesce *c) 4680 { 4681 struct mvpp2_port *port = netdev_priv(dev); 4682 int queue; 4683 4684 for (queue = 0; queue < port->nrxqs; queue++) { 4685 struct mvpp2_rx_queue *rxq = port->rxqs[queue]; 4686 4687 rxq->time_coal = c->rx_coalesce_usecs; 4688 rxq->pkts_coal = c->rx_max_coalesced_frames; 4689 mvpp2_rx_pkts_coal_set(port, rxq); 4690 mvpp2_rx_time_coal_set(port, rxq); 4691 } 4692 4693 if (port->has_tx_irqs) { 4694 port->tx_time_coal = c->tx_coalesce_usecs; 4695 mvpp2_tx_time_coal_set(port); 4696 } 4697 4698 for (queue = 0; queue < port->ntxqs; queue++) { 4699 struct mvpp2_tx_queue *txq = port->txqs[queue]; 4700 4701 txq->done_pkts_coal = c->tx_max_coalesced_frames; 4702 4703 if (port->has_tx_irqs) 4704 mvpp2_tx_pkts_coal_set(port, txq); 4705 } 4706 4707 return 0; 4708 } 4709 4710 /* get coalescing for ethtools */ 4711 static int mvpp2_ethtool_get_coalesce(struct net_device *dev, 4712 struct ethtool_coalesce *c) 4713 { 4714 struct mvpp2_port *port = netdev_priv(dev); 4715 4716 c->rx_coalesce_usecs = port->rxqs[0]->time_coal; 4717 c->rx_max_coalesced_frames = port->rxqs[0]->pkts_coal; 4718 c->tx_max_coalesced_frames = port->txqs[0]->done_pkts_coal; 4719 c->tx_coalesce_usecs = port->tx_time_coal; 4720 return 0; 4721 } 4722 4723 static void mvpp2_ethtool_get_drvinfo(struct net_device *dev, 4724 struct ethtool_drvinfo *drvinfo) 4725 { 4726 strlcpy(drvinfo->driver, MVPP2_DRIVER_NAME, 4727 sizeof(drvinfo->driver)); 4728 strlcpy(drvinfo->version, MVPP2_DRIVER_VERSION, 4729 sizeof(drvinfo->version)); 4730 strlcpy(drvinfo->bus_info, dev_name(&dev->dev), 4731 sizeof(drvinfo->bus_info)); 4732 } 4733 4734 static void mvpp2_ethtool_get_ringparam(struct net_device *dev, 4735 struct ethtool_ringparam *ring) 4736 { 4737 struct mvpp2_port *port = netdev_priv(dev); 4738 4739 ring->rx_max_pending = MVPP2_MAX_RXD_MAX; 4740 ring->tx_max_pending = MVPP2_MAX_TXD_MAX; 4741 ring->rx_pending = port->rx_ring_size; 4742 ring->tx_pending = port->tx_ring_size; 4743 } 4744 4745 static int mvpp2_ethtool_set_ringparam(struct net_device *dev, 4746 struct ethtool_ringparam *ring) 4747 { 4748 struct mvpp2_port *port = netdev_priv(dev); 4749 u16 prev_rx_ring_size = port->rx_ring_size; 4750 u16 prev_tx_ring_size = port->tx_ring_size; 4751 int err; 4752 4753 err = mvpp2_check_ringparam_valid(dev, ring); 4754 if (err) 4755 return err; 4756 4757 if (!netif_running(dev)) { 4758 port->rx_ring_size = ring->rx_pending; 4759 port->tx_ring_size = ring->tx_pending; 4760 return 0; 4761 } 4762 4763 /* The interface is running, so we have to force a 4764 * reallocation of the queues 4765 */ 4766 mvpp2_stop_dev(port); 4767 mvpp2_cleanup_rxqs(port); 4768 mvpp2_cleanup_txqs(port); 4769 4770 port->rx_ring_size = ring->rx_pending; 4771 port->tx_ring_size = ring->tx_pending; 4772 4773 err = mvpp2_setup_rxqs(port); 4774 if (err) { 4775 /* Reallocate Rx queues with the original ring size */ 4776 port->rx_ring_size = prev_rx_ring_size; 4777 ring->rx_pending = prev_rx_ring_size; 4778 err = mvpp2_setup_rxqs(port); 4779 if (err) 4780 goto err_out; 4781 } 4782 err = mvpp2_setup_txqs(port); 4783 if (err) { 4784 /* Reallocate Tx queues with the original ring size */ 4785 port->tx_ring_size = prev_tx_ring_size; 4786 ring->tx_pending = prev_tx_ring_size; 4787 err = mvpp2_setup_txqs(port); 4788 if (err) 4789 goto err_clean_rxqs; 4790 } 4791 4792 mvpp2_start_dev(port); 4793 mvpp2_egress_enable(port); 4794 mvpp2_ingress_enable(port); 4795 4796 return 0; 4797 4798 err_clean_rxqs: 4799 mvpp2_cleanup_rxqs(port); 4800 err_out: 4801 netdev_err(dev, "failed to change ring parameters"); 4802 return err; 4803 } 4804 4805 static void mvpp2_ethtool_get_pause_param(struct net_device *dev, 4806 struct ethtool_pauseparam *pause) 4807 { 4808 struct mvpp2_port *port = netdev_priv(dev); 4809 4810 if (!port->phylink) 4811 return; 4812 4813 phylink_ethtool_get_pauseparam(port->phylink, pause); 4814 } 4815 4816 static int mvpp2_ethtool_set_pause_param(struct net_device *dev, 4817 struct ethtool_pauseparam *pause) 4818 { 4819 struct mvpp2_port *port = netdev_priv(dev); 4820 4821 if (!port->phylink) 4822 return -ENOTSUPP; 4823 4824 return phylink_ethtool_set_pauseparam(port->phylink, pause); 4825 } 4826 4827 static int mvpp2_ethtool_get_link_ksettings(struct net_device *dev, 4828 struct ethtool_link_ksettings *cmd) 4829 { 4830 struct mvpp2_port *port = netdev_priv(dev); 4831 4832 if (!port->phylink) 4833 return -ENOTSUPP; 4834 4835 return phylink_ethtool_ksettings_get(port->phylink, cmd); 4836 } 4837 4838 static int mvpp2_ethtool_set_link_ksettings(struct net_device *dev, 4839 const struct ethtool_link_ksettings *cmd) 4840 { 4841 struct mvpp2_port *port = netdev_priv(dev); 4842 4843 if (!port->phylink) 4844 return -ENOTSUPP; 4845 4846 return phylink_ethtool_ksettings_set(port->phylink, cmd); 4847 } 4848 4849 static int mvpp2_ethtool_get_rxnfc(struct net_device *dev, 4850 struct ethtool_rxnfc *info, u32 *rules) 4851 { 4852 struct mvpp2_port *port = netdev_priv(dev); 4853 int ret = 0, i, loc = 0; 4854 4855 if (!mvpp22_rss_is_supported()) 4856 return -EOPNOTSUPP; 4857 4858 switch (info->cmd) { 4859 case ETHTOOL_GRXFH: 4860 ret = mvpp2_ethtool_rxfh_get(port, info); 4861 break; 4862 case ETHTOOL_GRXRINGS: 4863 info->data = port->nrxqs; 4864 break; 4865 case ETHTOOL_GRXCLSRLCNT: 4866 info->rule_cnt = port->n_rfs_rules; 4867 break; 4868 case ETHTOOL_GRXCLSRULE: 4869 ret = mvpp2_ethtool_cls_rule_get(port, info); 4870 break; 4871 case ETHTOOL_GRXCLSRLALL: 4872 for (i = 0; i < MVPP2_N_RFS_ENTRIES_PER_FLOW; i++) { 4873 if (port->rfs_rules[i]) 4874 rules[loc++] = i; 4875 } 4876 break; 4877 default: 4878 return -ENOTSUPP; 4879 } 4880 4881 return ret; 4882 } 4883 4884 static int mvpp2_ethtool_set_rxnfc(struct net_device *dev, 4885 struct ethtool_rxnfc *info) 4886 { 4887 struct mvpp2_port *port = netdev_priv(dev); 4888 int ret = 0; 4889 4890 if (!mvpp22_rss_is_supported()) 4891 return -EOPNOTSUPP; 4892 4893 switch (info->cmd) { 4894 case ETHTOOL_SRXFH: 4895 ret = mvpp2_ethtool_rxfh_set(port, info); 4896 break; 4897 case ETHTOOL_SRXCLSRLINS: 4898 ret = mvpp2_ethtool_cls_rule_ins(port, info); 4899 break; 4900 case ETHTOOL_SRXCLSRLDEL: 4901 ret = mvpp2_ethtool_cls_rule_del(port, info); 4902 break; 4903 default: 4904 return -EOPNOTSUPP; 4905 } 4906 return ret; 4907 } 4908 4909 static u32 mvpp2_ethtool_get_rxfh_indir_size(struct net_device *dev) 4910 { 4911 return mvpp22_rss_is_supported() ? MVPP22_RSS_TABLE_ENTRIES : 0; 4912 } 4913 4914 static int mvpp2_ethtool_get_rxfh(struct net_device *dev, u32 *indir, u8 *key, 4915 u8 *hfunc) 4916 { 4917 struct mvpp2_port *port = netdev_priv(dev); 4918 int ret = 0; 4919 4920 if (!mvpp22_rss_is_supported()) 4921 return -EOPNOTSUPP; 4922 4923 if (indir) 4924 ret = mvpp22_port_rss_ctx_indir_get(port, 0, indir); 4925 4926 if (hfunc) 4927 *hfunc = ETH_RSS_HASH_CRC32; 4928 4929 return ret; 4930 } 4931 4932 static int mvpp2_ethtool_set_rxfh(struct net_device *dev, const u32 *indir, 4933 const u8 *key, const u8 hfunc) 4934 { 4935 struct mvpp2_port *port = netdev_priv(dev); 4936 int ret = 0; 4937 4938 if (!mvpp22_rss_is_supported()) 4939 return -EOPNOTSUPP; 4940 4941 if (hfunc != ETH_RSS_HASH_NO_CHANGE && hfunc != ETH_RSS_HASH_CRC32) 4942 return -EOPNOTSUPP; 4943 4944 if (key) 4945 return -EOPNOTSUPP; 4946 4947 if (indir) 4948 ret = mvpp22_port_rss_ctx_indir_set(port, 0, indir); 4949 4950 return ret; 4951 } 4952 4953 static int mvpp2_ethtool_get_rxfh_context(struct net_device *dev, u32 *indir, 4954 u8 *key, u8 *hfunc, u32 rss_context) 4955 { 4956 struct mvpp2_port *port = netdev_priv(dev); 4957 int ret = 0; 4958 4959 if (!mvpp22_rss_is_supported()) 4960 return -EOPNOTSUPP; 4961 if (rss_context >= MVPP22_N_RSS_TABLES) 4962 return -EINVAL; 4963 4964 if (hfunc) 4965 *hfunc = ETH_RSS_HASH_CRC32; 4966 4967 if (indir) 4968 ret = mvpp22_port_rss_ctx_indir_get(port, rss_context, indir); 4969 4970 return ret; 4971 } 4972 4973 static int mvpp2_ethtool_set_rxfh_context(struct net_device *dev, 4974 const u32 *indir, const u8 *key, 4975 const u8 hfunc, u32 *rss_context, 4976 bool delete) 4977 { 4978 struct mvpp2_port *port = netdev_priv(dev); 4979 int ret; 4980 4981 if (!mvpp22_rss_is_supported()) 4982 return -EOPNOTSUPP; 4983 4984 if (hfunc != ETH_RSS_HASH_NO_CHANGE && hfunc != ETH_RSS_HASH_CRC32) 4985 return -EOPNOTSUPP; 4986 4987 if (key) 4988 return -EOPNOTSUPP; 4989 4990 if (delete) 4991 return mvpp22_port_rss_ctx_delete(port, *rss_context); 4992 4993 if (*rss_context == ETH_RXFH_CONTEXT_ALLOC) { 4994 ret = mvpp22_port_rss_ctx_create(port, rss_context); 4995 if (ret) 4996 return ret; 4997 } 4998 4999 return mvpp22_port_rss_ctx_indir_set(port, *rss_context, indir); 5000 } 5001 /* Device ops */ 5002 5003 static const struct net_device_ops mvpp2_netdev_ops = { 5004 .ndo_open = mvpp2_open, 5005 .ndo_stop = mvpp2_stop, 5006 .ndo_start_xmit = mvpp2_tx, 5007 .ndo_set_rx_mode = mvpp2_set_rx_mode, 5008 .ndo_set_mac_address = mvpp2_set_mac_address, 5009 .ndo_change_mtu = mvpp2_change_mtu, 5010 .ndo_get_stats64 = mvpp2_get_stats64, 5011 .ndo_do_ioctl = mvpp2_ioctl, 5012 .ndo_vlan_rx_add_vid = mvpp2_vlan_rx_add_vid, 5013 .ndo_vlan_rx_kill_vid = mvpp2_vlan_rx_kill_vid, 5014 .ndo_set_features = mvpp2_set_features, 5015 .ndo_bpf = mvpp2_xdp, 5016 .ndo_xdp_xmit = mvpp2_xdp_xmit, 5017 }; 5018 5019 static const struct ethtool_ops mvpp2_eth_tool_ops = { 5020 .supported_coalesce_params = ETHTOOL_COALESCE_USECS | 5021 ETHTOOL_COALESCE_MAX_FRAMES, 5022 .nway_reset = mvpp2_ethtool_nway_reset, 5023 .get_link = ethtool_op_get_link, 5024 .set_coalesce = mvpp2_ethtool_set_coalesce, 5025 .get_coalesce = mvpp2_ethtool_get_coalesce, 5026 .get_drvinfo = mvpp2_ethtool_get_drvinfo, 5027 .get_ringparam = mvpp2_ethtool_get_ringparam, 5028 .set_ringparam = mvpp2_ethtool_set_ringparam, 5029 .get_strings = mvpp2_ethtool_get_strings, 5030 .get_ethtool_stats = mvpp2_ethtool_get_stats, 5031 .get_sset_count = mvpp2_ethtool_get_sset_count, 5032 .get_pauseparam = mvpp2_ethtool_get_pause_param, 5033 .set_pauseparam = mvpp2_ethtool_set_pause_param, 5034 .get_link_ksettings = mvpp2_ethtool_get_link_ksettings, 5035 .set_link_ksettings = mvpp2_ethtool_set_link_ksettings, 5036 .get_rxnfc = mvpp2_ethtool_get_rxnfc, 5037 .set_rxnfc = mvpp2_ethtool_set_rxnfc, 5038 .get_rxfh_indir_size = mvpp2_ethtool_get_rxfh_indir_size, 5039 .get_rxfh = mvpp2_ethtool_get_rxfh, 5040 .set_rxfh = mvpp2_ethtool_set_rxfh, 5041 .get_rxfh_context = mvpp2_ethtool_get_rxfh_context, 5042 .set_rxfh_context = mvpp2_ethtool_set_rxfh_context, 5043 }; 5044 5045 /* Used for PPv2.1, or PPv2.2 with the old Device Tree binding that 5046 * had a single IRQ defined per-port. 5047 */ 5048 static int mvpp2_simple_queue_vectors_init(struct mvpp2_port *port, 5049 struct device_node *port_node) 5050 { 5051 struct mvpp2_queue_vector *v = &port->qvecs[0]; 5052 5053 v->first_rxq = 0; 5054 v->nrxqs = port->nrxqs; 5055 v->type = MVPP2_QUEUE_VECTOR_SHARED; 5056 v->sw_thread_id = 0; 5057 v->sw_thread_mask = *cpumask_bits(cpu_online_mask); 5058 v->port = port; 5059 v->irq = irq_of_parse_and_map(port_node, 0); 5060 if (v->irq <= 0) 5061 return -EINVAL; 5062 netif_napi_add(port->dev, &v->napi, mvpp2_poll, 5063 NAPI_POLL_WEIGHT); 5064 5065 port->nqvecs = 1; 5066 5067 return 0; 5068 } 5069 5070 static int mvpp2_multi_queue_vectors_init(struct mvpp2_port *port, 5071 struct device_node *port_node) 5072 { 5073 struct mvpp2 *priv = port->priv; 5074 struct mvpp2_queue_vector *v; 5075 int i, ret; 5076 5077 switch (queue_mode) { 5078 case MVPP2_QDIST_SINGLE_MODE: 5079 port->nqvecs = priv->nthreads + 1; 5080 break; 5081 case MVPP2_QDIST_MULTI_MODE: 5082 port->nqvecs = priv->nthreads; 5083 break; 5084 } 5085 5086 for (i = 0; i < port->nqvecs; i++) { 5087 char irqname[16]; 5088 5089 v = port->qvecs + i; 5090 5091 v->port = port; 5092 v->type = MVPP2_QUEUE_VECTOR_PRIVATE; 5093 v->sw_thread_id = i; 5094 v->sw_thread_mask = BIT(i); 5095 5096 if (port->flags & MVPP2_F_DT_COMPAT) 5097 snprintf(irqname, sizeof(irqname), "tx-cpu%d", i); 5098 else 5099 snprintf(irqname, sizeof(irqname), "hif%d", i); 5100 5101 if (queue_mode == MVPP2_QDIST_MULTI_MODE) { 5102 v->first_rxq = i; 5103 v->nrxqs = 1; 5104 } else if (queue_mode == MVPP2_QDIST_SINGLE_MODE && 5105 i == (port->nqvecs - 1)) { 5106 v->first_rxq = 0; 5107 v->nrxqs = port->nrxqs; 5108 v->type = MVPP2_QUEUE_VECTOR_SHARED; 5109 5110 if (port->flags & MVPP2_F_DT_COMPAT) 5111 strncpy(irqname, "rx-shared", sizeof(irqname)); 5112 } 5113 5114 if (port_node) 5115 v->irq = of_irq_get_byname(port_node, irqname); 5116 else 5117 v->irq = fwnode_irq_get(port->fwnode, i); 5118 if (v->irq <= 0) { 5119 ret = -EINVAL; 5120 goto err; 5121 } 5122 5123 netif_napi_add(port->dev, &v->napi, mvpp2_poll, 5124 NAPI_POLL_WEIGHT); 5125 } 5126 5127 return 0; 5128 5129 err: 5130 for (i = 0; i < port->nqvecs; i++) 5131 irq_dispose_mapping(port->qvecs[i].irq); 5132 return ret; 5133 } 5134 5135 static int mvpp2_queue_vectors_init(struct mvpp2_port *port, 5136 struct device_node *port_node) 5137 { 5138 if (port->has_tx_irqs) 5139 return mvpp2_multi_queue_vectors_init(port, port_node); 5140 else 5141 return mvpp2_simple_queue_vectors_init(port, port_node); 5142 } 5143 5144 static void mvpp2_queue_vectors_deinit(struct mvpp2_port *port) 5145 { 5146 int i; 5147 5148 for (i = 0; i < port->nqvecs; i++) 5149 irq_dispose_mapping(port->qvecs[i].irq); 5150 } 5151 5152 /* Configure Rx queue group interrupt for this port */ 5153 static void mvpp2_rx_irqs_setup(struct mvpp2_port *port) 5154 { 5155 struct mvpp2 *priv = port->priv; 5156 u32 val; 5157 int i; 5158 5159 if (priv->hw_version == MVPP21) { 5160 mvpp2_write(priv, MVPP21_ISR_RXQ_GROUP_REG(port->id), 5161 port->nrxqs); 5162 return; 5163 } 5164 5165 /* Handle the more complicated PPv2.2 case */ 5166 for (i = 0; i < port->nqvecs; i++) { 5167 struct mvpp2_queue_vector *qv = port->qvecs + i; 5168 5169 if (!qv->nrxqs) 5170 continue; 5171 5172 val = qv->sw_thread_id; 5173 val |= port->id << MVPP22_ISR_RXQ_GROUP_INDEX_GROUP_OFFSET; 5174 mvpp2_write(priv, MVPP22_ISR_RXQ_GROUP_INDEX_REG, val); 5175 5176 val = qv->first_rxq; 5177 val |= qv->nrxqs << MVPP22_ISR_RXQ_SUB_GROUP_SIZE_OFFSET; 5178 mvpp2_write(priv, MVPP22_ISR_RXQ_SUB_GROUP_CONFIG_REG, val); 5179 } 5180 } 5181 5182 /* Initialize port HW */ 5183 static int mvpp2_port_init(struct mvpp2_port *port) 5184 { 5185 struct device *dev = port->dev->dev.parent; 5186 struct mvpp2 *priv = port->priv; 5187 struct mvpp2_txq_pcpu *txq_pcpu; 5188 unsigned int thread; 5189 int queue, err; 5190 5191 /* Checks for hardware constraints */ 5192 if (port->first_rxq + port->nrxqs > 5193 MVPP2_MAX_PORTS * priv->max_port_rxqs) 5194 return -EINVAL; 5195 5196 if (port->nrxqs > priv->max_port_rxqs || port->ntxqs > MVPP2_MAX_TXQ) 5197 return -EINVAL; 5198 5199 /* Disable port */ 5200 mvpp2_egress_disable(port); 5201 mvpp2_port_disable(port); 5202 5203 port->tx_time_coal = MVPP2_TXDONE_COAL_USEC; 5204 5205 port->txqs = devm_kcalloc(dev, port->ntxqs, sizeof(*port->txqs), 5206 GFP_KERNEL); 5207 if (!port->txqs) 5208 return -ENOMEM; 5209 5210 /* Associate physical Tx queues to this port and initialize. 5211 * The mapping is predefined. 5212 */ 5213 for (queue = 0; queue < port->ntxqs; queue++) { 5214 int queue_phy_id = mvpp2_txq_phys(port->id, queue); 5215 struct mvpp2_tx_queue *txq; 5216 5217 txq = devm_kzalloc(dev, sizeof(*txq), GFP_KERNEL); 5218 if (!txq) { 5219 err = -ENOMEM; 5220 goto err_free_percpu; 5221 } 5222 5223 txq->pcpu = alloc_percpu(struct mvpp2_txq_pcpu); 5224 if (!txq->pcpu) { 5225 err = -ENOMEM; 5226 goto err_free_percpu; 5227 } 5228 5229 txq->id = queue_phy_id; 5230 txq->log_id = queue; 5231 txq->done_pkts_coal = MVPP2_TXDONE_COAL_PKTS_THRESH; 5232 for (thread = 0; thread < priv->nthreads; thread++) { 5233 txq_pcpu = per_cpu_ptr(txq->pcpu, thread); 5234 txq_pcpu->thread = thread; 5235 } 5236 5237 port->txqs[queue] = txq; 5238 } 5239 5240 port->rxqs = devm_kcalloc(dev, port->nrxqs, sizeof(*port->rxqs), 5241 GFP_KERNEL); 5242 if (!port->rxqs) { 5243 err = -ENOMEM; 5244 goto err_free_percpu; 5245 } 5246 5247 /* Allocate and initialize Rx queue for this port */ 5248 for (queue = 0; queue < port->nrxqs; queue++) { 5249 struct mvpp2_rx_queue *rxq; 5250 5251 /* Map physical Rx queue to port's logical Rx queue */ 5252 rxq = devm_kzalloc(dev, sizeof(*rxq), GFP_KERNEL); 5253 if (!rxq) { 5254 err = -ENOMEM; 5255 goto err_free_percpu; 5256 } 5257 /* Map this Rx queue to a physical queue */ 5258 rxq->id = port->first_rxq + queue; 5259 rxq->port = port->id; 5260 rxq->logic_rxq = queue; 5261 5262 port->rxqs[queue] = rxq; 5263 } 5264 5265 mvpp2_rx_irqs_setup(port); 5266 5267 /* Create Rx descriptor rings */ 5268 for (queue = 0; queue < port->nrxqs; queue++) { 5269 struct mvpp2_rx_queue *rxq = port->rxqs[queue]; 5270 5271 rxq->size = port->rx_ring_size; 5272 rxq->pkts_coal = MVPP2_RX_COAL_PKTS; 5273 rxq->time_coal = MVPP2_RX_COAL_USEC; 5274 } 5275 5276 mvpp2_ingress_disable(port); 5277 5278 /* Port default configuration */ 5279 mvpp2_defaults_set(port); 5280 5281 /* Port's classifier configuration */ 5282 mvpp2_cls_oversize_rxq_set(port); 5283 mvpp2_cls_port_config(port); 5284 5285 if (mvpp22_rss_is_supported()) 5286 mvpp22_port_rss_init(port); 5287 5288 /* Provide an initial Rx packet size */ 5289 port->pkt_size = MVPP2_RX_PKT_SIZE(port->dev->mtu); 5290 5291 /* Initialize pools for swf */ 5292 err = mvpp2_swf_bm_pool_init(port); 5293 if (err) 5294 goto err_free_percpu; 5295 5296 /* Clear all port stats */ 5297 mvpp2_read_stats(port); 5298 memset(port->ethtool_stats, 0, 5299 MVPP2_N_ETHTOOL_STATS(port->ntxqs, port->nrxqs) * sizeof(u64)); 5300 5301 return 0; 5302 5303 err_free_percpu: 5304 for (queue = 0; queue < port->ntxqs; queue++) { 5305 if (!port->txqs[queue]) 5306 continue; 5307 free_percpu(port->txqs[queue]->pcpu); 5308 } 5309 return err; 5310 } 5311 5312 static bool mvpp22_port_has_legacy_tx_irqs(struct device_node *port_node, 5313 unsigned long *flags) 5314 { 5315 char *irqs[5] = { "rx-shared", "tx-cpu0", "tx-cpu1", "tx-cpu2", 5316 "tx-cpu3" }; 5317 int i; 5318 5319 for (i = 0; i < 5; i++) 5320 if (of_property_match_string(port_node, "interrupt-names", 5321 irqs[i]) < 0) 5322 return false; 5323 5324 *flags |= MVPP2_F_DT_COMPAT; 5325 return true; 5326 } 5327 5328 /* Checks if the port dt description has the required Tx interrupts: 5329 * - PPv2.1: there are no such interrupts. 5330 * - PPv2.2: 5331 * - The old DTs have: "rx-shared", "tx-cpuX" with X in [0...3] 5332 * - The new ones have: "hifX" with X in [0..8] 5333 * 5334 * All those variants are supported to keep the backward compatibility. 5335 */ 5336 static bool mvpp2_port_has_irqs(struct mvpp2 *priv, 5337 struct device_node *port_node, 5338 unsigned long *flags) 5339 { 5340 char name[5]; 5341 int i; 5342 5343 /* ACPI */ 5344 if (!port_node) 5345 return true; 5346 5347 if (priv->hw_version == MVPP21) 5348 return false; 5349 5350 if (mvpp22_port_has_legacy_tx_irqs(port_node, flags)) 5351 return true; 5352 5353 for (i = 0; i < MVPP2_MAX_THREADS; i++) { 5354 snprintf(name, 5, "hif%d", i); 5355 if (of_property_match_string(port_node, "interrupt-names", 5356 name) < 0) 5357 return false; 5358 } 5359 5360 return true; 5361 } 5362 5363 static void mvpp2_port_copy_mac_addr(struct net_device *dev, struct mvpp2 *priv, 5364 struct fwnode_handle *fwnode, 5365 char **mac_from) 5366 { 5367 struct mvpp2_port *port = netdev_priv(dev); 5368 char hw_mac_addr[ETH_ALEN] = {0}; 5369 char fw_mac_addr[ETH_ALEN]; 5370 5371 if (fwnode_get_mac_address(fwnode, fw_mac_addr, ETH_ALEN)) { 5372 *mac_from = "firmware node"; 5373 ether_addr_copy(dev->dev_addr, fw_mac_addr); 5374 return; 5375 } 5376 5377 if (priv->hw_version == MVPP21) { 5378 mvpp21_get_mac_address(port, hw_mac_addr); 5379 if (is_valid_ether_addr(hw_mac_addr)) { 5380 *mac_from = "hardware"; 5381 ether_addr_copy(dev->dev_addr, hw_mac_addr); 5382 return; 5383 } 5384 } 5385 5386 *mac_from = "random"; 5387 eth_hw_addr_random(dev); 5388 } 5389 5390 static struct mvpp2_port *mvpp2_phylink_to_port(struct phylink_config *config) 5391 { 5392 return container_of(config, struct mvpp2_port, phylink_config); 5393 } 5394 5395 static void mvpp2_phylink_validate(struct phylink_config *config, 5396 unsigned long *supported, 5397 struct phylink_link_state *state) 5398 { 5399 struct mvpp2_port *port = mvpp2_phylink_to_port(config); 5400 __ETHTOOL_DECLARE_LINK_MODE_MASK(mask) = { 0, }; 5401 5402 /* Invalid combinations */ 5403 switch (state->interface) { 5404 case PHY_INTERFACE_MODE_10GBASER: 5405 case PHY_INTERFACE_MODE_XAUI: 5406 if (!mvpp2_port_supports_xlg(port)) 5407 goto empty_set; 5408 break; 5409 case PHY_INTERFACE_MODE_RGMII: 5410 case PHY_INTERFACE_MODE_RGMII_ID: 5411 case PHY_INTERFACE_MODE_RGMII_RXID: 5412 case PHY_INTERFACE_MODE_RGMII_TXID: 5413 if (!mvpp2_port_supports_rgmii(port)) 5414 goto empty_set; 5415 break; 5416 default: 5417 break; 5418 } 5419 5420 phylink_set(mask, Autoneg); 5421 phylink_set_port_modes(mask); 5422 phylink_set(mask, Pause); 5423 phylink_set(mask, Asym_Pause); 5424 5425 switch (state->interface) { 5426 case PHY_INTERFACE_MODE_10GBASER: 5427 case PHY_INTERFACE_MODE_XAUI: 5428 case PHY_INTERFACE_MODE_NA: 5429 if (mvpp2_port_supports_xlg(port)) { 5430 phylink_set(mask, 10000baseT_Full); 5431 phylink_set(mask, 10000baseCR_Full); 5432 phylink_set(mask, 10000baseSR_Full); 5433 phylink_set(mask, 10000baseLR_Full); 5434 phylink_set(mask, 10000baseLRM_Full); 5435 phylink_set(mask, 10000baseER_Full); 5436 phylink_set(mask, 10000baseKR_Full); 5437 } 5438 if (state->interface != PHY_INTERFACE_MODE_NA) 5439 break; 5440 /* Fall-through */ 5441 case PHY_INTERFACE_MODE_RGMII: 5442 case PHY_INTERFACE_MODE_RGMII_ID: 5443 case PHY_INTERFACE_MODE_RGMII_RXID: 5444 case PHY_INTERFACE_MODE_RGMII_TXID: 5445 case PHY_INTERFACE_MODE_SGMII: 5446 phylink_set(mask, 10baseT_Half); 5447 phylink_set(mask, 10baseT_Full); 5448 phylink_set(mask, 100baseT_Half); 5449 phylink_set(mask, 100baseT_Full); 5450 phylink_set(mask, 1000baseT_Full); 5451 phylink_set(mask, 1000baseX_Full); 5452 if (state->interface != PHY_INTERFACE_MODE_NA) 5453 break; 5454 /* Fall-through */ 5455 case PHY_INTERFACE_MODE_1000BASEX: 5456 case PHY_INTERFACE_MODE_2500BASEX: 5457 if (port->comphy || 5458 state->interface != PHY_INTERFACE_MODE_2500BASEX) { 5459 phylink_set(mask, 1000baseT_Full); 5460 phylink_set(mask, 1000baseX_Full); 5461 } 5462 if (port->comphy || 5463 state->interface == PHY_INTERFACE_MODE_2500BASEX) { 5464 phylink_set(mask, 2500baseT_Full); 5465 phylink_set(mask, 2500baseX_Full); 5466 } 5467 break; 5468 default: 5469 goto empty_set; 5470 } 5471 5472 bitmap_and(supported, supported, mask, __ETHTOOL_LINK_MODE_MASK_NBITS); 5473 bitmap_and(state->advertising, state->advertising, mask, 5474 __ETHTOOL_LINK_MODE_MASK_NBITS); 5475 5476 phylink_helper_basex_speed(state); 5477 return; 5478 5479 empty_set: 5480 bitmap_zero(supported, __ETHTOOL_LINK_MODE_MASK_NBITS); 5481 } 5482 5483 static void mvpp22_xlg_pcs_get_state(struct mvpp2_port *port, 5484 struct phylink_link_state *state) 5485 { 5486 u32 val; 5487 5488 state->speed = SPEED_10000; 5489 state->duplex = 1; 5490 state->an_complete = 1; 5491 5492 val = readl(port->base + MVPP22_XLG_STATUS); 5493 state->link = !!(val & MVPP22_XLG_STATUS_LINK_UP); 5494 5495 state->pause = 0; 5496 val = readl(port->base + MVPP22_XLG_CTRL0_REG); 5497 if (val & MVPP22_XLG_CTRL0_TX_FLOW_CTRL_EN) 5498 state->pause |= MLO_PAUSE_TX; 5499 if (val & MVPP22_XLG_CTRL0_RX_FLOW_CTRL_EN) 5500 state->pause |= MLO_PAUSE_RX; 5501 } 5502 5503 static void mvpp2_gmac_pcs_get_state(struct mvpp2_port *port, 5504 struct phylink_link_state *state) 5505 { 5506 u32 val; 5507 5508 val = readl(port->base + MVPP2_GMAC_STATUS0); 5509 5510 state->an_complete = !!(val & MVPP2_GMAC_STATUS0_AN_COMPLETE); 5511 state->link = !!(val & MVPP2_GMAC_STATUS0_LINK_UP); 5512 state->duplex = !!(val & MVPP2_GMAC_STATUS0_FULL_DUPLEX); 5513 5514 switch (port->phy_interface) { 5515 case PHY_INTERFACE_MODE_1000BASEX: 5516 state->speed = SPEED_1000; 5517 break; 5518 case PHY_INTERFACE_MODE_2500BASEX: 5519 state->speed = SPEED_2500; 5520 break; 5521 default: 5522 if (val & MVPP2_GMAC_STATUS0_GMII_SPEED) 5523 state->speed = SPEED_1000; 5524 else if (val & MVPP2_GMAC_STATUS0_MII_SPEED) 5525 state->speed = SPEED_100; 5526 else 5527 state->speed = SPEED_10; 5528 } 5529 5530 state->pause = 0; 5531 if (val & MVPP2_GMAC_STATUS0_RX_PAUSE) 5532 state->pause |= MLO_PAUSE_RX; 5533 if (val & MVPP2_GMAC_STATUS0_TX_PAUSE) 5534 state->pause |= MLO_PAUSE_TX; 5535 } 5536 5537 static void mvpp2_phylink_mac_pcs_get_state(struct phylink_config *config, 5538 struct phylink_link_state *state) 5539 { 5540 struct mvpp2_port *port = mvpp2_phylink_to_port(config); 5541 5542 if (port->priv->hw_version == MVPP22 && port->gop_id == 0) { 5543 u32 mode = readl(port->base + MVPP22_XLG_CTRL3_REG); 5544 mode &= MVPP22_XLG_CTRL3_MACMODESELECT_MASK; 5545 5546 if (mode == MVPP22_XLG_CTRL3_MACMODESELECT_10G) { 5547 mvpp22_xlg_pcs_get_state(port, state); 5548 return; 5549 } 5550 } 5551 5552 mvpp2_gmac_pcs_get_state(port, state); 5553 } 5554 5555 static void mvpp2_mac_an_restart(struct phylink_config *config) 5556 { 5557 struct mvpp2_port *port = mvpp2_phylink_to_port(config); 5558 u32 val = readl(port->base + MVPP2_GMAC_AUTONEG_CONFIG); 5559 5560 writel(val | MVPP2_GMAC_IN_BAND_RESTART_AN, 5561 port->base + MVPP2_GMAC_AUTONEG_CONFIG); 5562 writel(val & ~MVPP2_GMAC_IN_BAND_RESTART_AN, 5563 port->base + MVPP2_GMAC_AUTONEG_CONFIG); 5564 } 5565 5566 static void mvpp2_xlg_config(struct mvpp2_port *port, unsigned int mode, 5567 const struct phylink_link_state *state) 5568 { 5569 u32 val; 5570 5571 mvpp2_modify(port->base + MVPP22_XLG_CTRL0_REG, 5572 MVPP22_XLG_CTRL0_MAC_RESET_DIS, 5573 MVPP22_XLG_CTRL0_MAC_RESET_DIS); 5574 mvpp2_modify(port->base + MVPP22_XLG_CTRL4_REG, 5575 MVPP22_XLG_CTRL4_MACMODSELECT_GMAC | 5576 MVPP22_XLG_CTRL4_EN_IDLE_CHECK | 5577 MVPP22_XLG_CTRL4_FWD_FC | MVPP22_XLG_CTRL4_FWD_PFC, 5578 MVPP22_XLG_CTRL4_FWD_FC | MVPP22_XLG_CTRL4_FWD_PFC); 5579 5580 /* Wait for reset to deassert */ 5581 do { 5582 val = readl(port->base + MVPP22_XLG_CTRL0_REG); 5583 } while (!(val & MVPP22_XLG_CTRL0_MAC_RESET_DIS)); 5584 } 5585 5586 static void mvpp2_gmac_config(struct mvpp2_port *port, unsigned int mode, 5587 const struct phylink_link_state *state) 5588 { 5589 u32 old_an, an; 5590 u32 old_ctrl0, ctrl0; 5591 u32 old_ctrl2, ctrl2; 5592 u32 old_ctrl4, ctrl4; 5593 5594 old_an = an = readl(port->base + MVPP2_GMAC_AUTONEG_CONFIG); 5595 old_ctrl0 = ctrl0 = readl(port->base + MVPP2_GMAC_CTRL_0_REG); 5596 old_ctrl2 = ctrl2 = readl(port->base + MVPP2_GMAC_CTRL_2_REG); 5597 old_ctrl4 = ctrl4 = readl(port->base + MVPP22_GMAC_CTRL_4_REG); 5598 5599 an &= ~(MVPP2_GMAC_AN_SPEED_EN | MVPP2_GMAC_FC_ADV_EN | 5600 MVPP2_GMAC_FC_ADV_ASM_EN | MVPP2_GMAC_FLOW_CTRL_AUTONEG | 5601 MVPP2_GMAC_AN_DUPLEX_EN | MVPP2_GMAC_IN_BAND_AUTONEG | 5602 MVPP2_GMAC_IN_BAND_AUTONEG_BYPASS); 5603 ctrl0 &= ~MVPP2_GMAC_PORT_TYPE_MASK; 5604 ctrl2 &= ~(MVPP2_GMAC_INBAND_AN_MASK | MVPP2_GMAC_PORT_RESET_MASK | 5605 MVPP2_GMAC_PCS_ENABLE_MASK); 5606 5607 /* Configure port type */ 5608 if (phy_interface_mode_is_8023z(state->interface)) { 5609 ctrl2 |= MVPP2_GMAC_PCS_ENABLE_MASK; 5610 ctrl4 &= ~MVPP22_CTRL4_EXT_PIN_GMII_SEL; 5611 ctrl4 |= MVPP22_CTRL4_SYNC_BYPASS_DIS | 5612 MVPP22_CTRL4_DP_CLK_SEL | 5613 MVPP22_CTRL4_QSGMII_BYPASS_ACTIVE; 5614 } else if (state->interface == PHY_INTERFACE_MODE_SGMII) { 5615 ctrl2 |= MVPP2_GMAC_PCS_ENABLE_MASK | MVPP2_GMAC_INBAND_AN_MASK; 5616 ctrl4 &= ~MVPP22_CTRL4_EXT_PIN_GMII_SEL; 5617 ctrl4 |= MVPP22_CTRL4_SYNC_BYPASS_DIS | 5618 MVPP22_CTRL4_DP_CLK_SEL | 5619 MVPP22_CTRL4_QSGMII_BYPASS_ACTIVE; 5620 } else if (phy_interface_mode_is_rgmii(state->interface)) { 5621 ctrl4 &= ~MVPP22_CTRL4_DP_CLK_SEL; 5622 ctrl4 |= MVPP22_CTRL4_EXT_PIN_GMII_SEL | 5623 MVPP22_CTRL4_SYNC_BYPASS_DIS | 5624 MVPP22_CTRL4_QSGMII_BYPASS_ACTIVE; 5625 } 5626 5627 /* Configure advertisement bits */ 5628 if (phylink_test(state->advertising, Pause)) 5629 an |= MVPP2_GMAC_FC_ADV_EN; 5630 if (phylink_test(state->advertising, Asym_Pause)) 5631 an |= MVPP2_GMAC_FC_ADV_ASM_EN; 5632 5633 /* Configure negotiation style */ 5634 if (!phylink_autoneg_inband(mode)) { 5635 /* Phy or fixed speed - no in-band AN, nothing to do, leave the 5636 * configured speed, duplex and flow control as-is. 5637 */ 5638 } else if (state->interface == PHY_INTERFACE_MODE_SGMII) { 5639 /* SGMII in-band mode receives the speed and duplex from 5640 * the PHY. Flow control information is not received. */ 5641 an &= ~(MVPP2_GMAC_FORCE_LINK_DOWN | 5642 MVPP2_GMAC_FORCE_LINK_PASS | 5643 MVPP2_GMAC_CONFIG_MII_SPEED | 5644 MVPP2_GMAC_CONFIG_GMII_SPEED | 5645 MVPP2_GMAC_CONFIG_FULL_DUPLEX); 5646 an |= MVPP2_GMAC_IN_BAND_AUTONEG | 5647 MVPP2_GMAC_AN_SPEED_EN | 5648 MVPP2_GMAC_AN_DUPLEX_EN; 5649 } else if (phy_interface_mode_is_8023z(state->interface)) { 5650 /* 1000BaseX and 2500BaseX ports cannot negotiate speed nor can 5651 * they negotiate duplex: they are always operating with a fixed 5652 * speed of 1000/2500Mbps in full duplex, so force 1000/2500 5653 * speed and full duplex here. 5654 */ 5655 ctrl0 |= MVPP2_GMAC_PORT_TYPE_MASK; 5656 an &= ~(MVPP2_GMAC_FORCE_LINK_DOWN | 5657 MVPP2_GMAC_FORCE_LINK_PASS | 5658 MVPP2_GMAC_CONFIG_MII_SPEED | 5659 MVPP2_GMAC_CONFIG_GMII_SPEED | 5660 MVPP2_GMAC_CONFIG_FULL_DUPLEX); 5661 an |= MVPP2_GMAC_IN_BAND_AUTONEG | 5662 MVPP2_GMAC_CONFIG_GMII_SPEED | 5663 MVPP2_GMAC_CONFIG_FULL_DUPLEX; 5664 5665 if (state->pause & MLO_PAUSE_AN && state->an_enabled) 5666 an |= MVPP2_GMAC_FLOW_CTRL_AUTONEG; 5667 } 5668 5669 /* Some fields of the auto-negotiation register require the port to be down when 5670 * their value is updated. 5671 */ 5672 #define MVPP2_GMAC_AN_PORT_DOWN_MASK \ 5673 (MVPP2_GMAC_IN_BAND_AUTONEG | \ 5674 MVPP2_GMAC_IN_BAND_AUTONEG_BYPASS | \ 5675 MVPP2_GMAC_CONFIG_MII_SPEED | MVPP2_GMAC_CONFIG_GMII_SPEED | \ 5676 MVPP2_GMAC_AN_SPEED_EN | MVPP2_GMAC_CONFIG_FULL_DUPLEX | \ 5677 MVPP2_GMAC_AN_DUPLEX_EN) 5678 5679 if ((old_ctrl0 ^ ctrl0) & MVPP2_GMAC_PORT_TYPE_MASK || 5680 (old_ctrl2 ^ ctrl2) & MVPP2_GMAC_INBAND_AN_MASK || 5681 (old_an ^ an) & MVPP2_GMAC_AN_PORT_DOWN_MASK) { 5682 /* Force link down */ 5683 old_an &= ~MVPP2_GMAC_FORCE_LINK_PASS; 5684 old_an |= MVPP2_GMAC_FORCE_LINK_DOWN; 5685 writel(old_an, port->base + MVPP2_GMAC_AUTONEG_CONFIG); 5686 5687 /* Set the GMAC in a reset state - do this in a way that 5688 * ensures we clear it below. 5689 */ 5690 old_ctrl2 |= MVPP2_GMAC_PORT_RESET_MASK; 5691 writel(old_ctrl2, port->base + MVPP2_GMAC_CTRL_2_REG); 5692 } 5693 5694 if (old_ctrl0 != ctrl0) 5695 writel(ctrl0, port->base + MVPP2_GMAC_CTRL_0_REG); 5696 if (old_ctrl2 != ctrl2) 5697 writel(ctrl2, port->base + MVPP2_GMAC_CTRL_2_REG); 5698 if (old_ctrl4 != ctrl4) 5699 writel(ctrl4, port->base + MVPP22_GMAC_CTRL_4_REG); 5700 if (old_an != an) 5701 writel(an, port->base + MVPP2_GMAC_AUTONEG_CONFIG); 5702 5703 if (old_ctrl2 & MVPP2_GMAC_PORT_RESET_MASK) { 5704 while (readl(port->base + MVPP2_GMAC_CTRL_2_REG) & 5705 MVPP2_GMAC_PORT_RESET_MASK) 5706 continue; 5707 } 5708 } 5709 5710 static void mvpp2_mac_config(struct phylink_config *config, unsigned int mode, 5711 const struct phylink_link_state *state) 5712 { 5713 struct mvpp2_port *port = mvpp2_phylink_to_port(config); 5714 bool change_interface = port->phy_interface != state->interface; 5715 5716 /* Check for invalid configuration */ 5717 if (mvpp2_is_xlg(state->interface) && port->gop_id != 0) { 5718 netdev_err(port->dev, "Invalid mode on %s\n", port->dev->name); 5719 return; 5720 } 5721 5722 /* Make sure the port is disabled when reconfiguring the mode */ 5723 mvpp2_port_disable(port); 5724 5725 if (port->priv->hw_version == MVPP22 && change_interface) { 5726 mvpp22_gop_mask_irq(port); 5727 5728 port->phy_interface = state->interface; 5729 5730 /* Reconfigure the serdes lanes */ 5731 phy_power_off(port->comphy); 5732 mvpp22_mode_reconfigure(port); 5733 } 5734 5735 /* mac (re)configuration */ 5736 if (mvpp2_is_xlg(state->interface)) 5737 mvpp2_xlg_config(port, mode, state); 5738 else if (phy_interface_mode_is_rgmii(state->interface) || 5739 phy_interface_mode_is_8023z(state->interface) || 5740 state->interface == PHY_INTERFACE_MODE_SGMII) 5741 mvpp2_gmac_config(port, mode, state); 5742 5743 if (port->priv->hw_version == MVPP21 && port->flags & MVPP2_F_LOOPBACK) 5744 mvpp2_port_loopback_set(port, state); 5745 5746 if (port->priv->hw_version == MVPP22 && change_interface) 5747 mvpp22_gop_unmask_irq(port); 5748 5749 mvpp2_port_enable(port); 5750 } 5751 5752 static void mvpp2_mac_link_up(struct phylink_config *config, 5753 struct phy_device *phy, 5754 unsigned int mode, phy_interface_t interface, 5755 int speed, int duplex, 5756 bool tx_pause, bool rx_pause) 5757 { 5758 struct mvpp2_port *port = mvpp2_phylink_to_port(config); 5759 u32 val; 5760 5761 if (mvpp2_is_xlg(interface)) { 5762 if (!phylink_autoneg_inband(mode)) { 5763 val = MVPP22_XLG_CTRL0_FORCE_LINK_PASS; 5764 if (tx_pause) 5765 val |= MVPP22_XLG_CTRL0_TX_FLOW_CTRL_EN; 5766 if (rx_pause) 5767 val |= MVPP22_XLG_CTRL0_RX_FLOW_CTRL_EN; 5768 5769 mvpp2_modify(port->base + MVPP22_XLG_CTRL0_REG, 5770 MVPP22_XLG_CTRL0_FORCE_LINK_DOWN | 5771 MVPP22_XLG_CTRL0_FORCE_LINK_PASS | 5772 MVPP22_XLG_CTRL0_TX_FLOW_CTRL_EN | 5773 MVPP22_XLG_CTRL0_RX_FLOW_CTRL_EN, val); 5774 } 5775 } else { 5776 if (!phylink_autoneg_inband(mode)) { 5777 val = MVPP2_GMAC_FORCE_LINK_PASS; 5778 5779 if (speed == SPEED_1000 || speed == SPEED_2500) 5780 val |= MVPP2_GMAC_CONFIG_GMII_SPEED; 5781 else if (speed == SPEED_100) 5782 val |= MVPP2_GMAC_CONFIG_MII_SPEED; 5783 5784 if (duplex == DUPLEX_FULL) 5785 val |= MVPP2_GMAC_CONFIG_FULL_DUPLEX; 5786 5787 mvpp2_modify(port->base + MVPP2_GMAC_AUTONEG_CONFIG, 5788 MVPP2_GMAC_FORCE_LINK_DOWN | 5789 MVPP2_GMAC_FORCE_LINK_PASS | 5790 MVPP2_GMAC_CONFIG_MII_SPEED | 5791 MVPP2_GMAC_CONFIG_GMII_SPEED | 5792 MVPP2_GMAC_CONFIG_FULL_DUPLEX, val); 5793 } 5794 5795 /* We can always update the flow control enable bits; 5796 * these will only be effective if flow control AN 5797 * (MVPP2_GMAC_FLOW_CTRL_AUTONEG) is disabled. 5798 */ 5799 val = 0; 5800 if (tx_pause) 5801 val |= MVPP22_CTRL4_TX_FC_EN; 5802 if (rx_pause) 5803 val |= MVPP22_CTRL4_RX_FC_EN; 5804 5805 mvpp2_modify(port->base + MVPP22_GMAC_CTRL_4_REG, 5806 MVPP22_CTRL4_RX_FC_EN | MVPP22_CTRL4_TX_FC_EN, 5807 val); 5808 } 5809 5810 mvpp2_port_enable(port); 5811 5812 mvpp2_egress_enable(port); 5813 mvpp2_ingress_enable(port); 5814 netif_tx_wake_all_queues(port->dev); 5815 } 5816 5817 static void mvpp2_mac_link_down(struct phylink_config *config, 5818 unsigned int mode, phy_interface_t interface) 5819 { 5820 struct mvpp2_port *port = mvpp2_phylink_to_port(config); 5821 u32 val; 5822 5823 if (!phylink_autoneg_inband(mode)) { 5824 if (mvpp2_is_xlg(interface)) { 5825 val = readl(port->base + MVPP22_XLG_CTRL0_REG); 5826 val &= ~MVPP22_XLG_CTRL0_FORCE_LINK_PASS; 5827 val |= MVPP22_XLG_CTRL0_FORCE_LINK_DOWN; 5828 writel(val, port->base + MVPP22_XLG_CTRL0_REG); 5829 } else { 5830 val = readl(port->base + MVPP2_GMAC_AUTONEG_CONFIG); 5831 val &= ~MVPP2_GMAC_FORCE_LINK_PASS; 5832 val |= MVPP2_GMAC_FORCE_LINK_DOWN; 5833 writel(val, port->base + MVPP2_GMAC_AUTONEG_CONFIG); 5834 } 5835 } 5836 5837 netif_tx_stop_all_queues(port->dev); 5838 mvpp2_egress_disable(port); 5839 mvpp2_ingress_disable(port); 5840 5841 mvpp2_port_disable(port); 5842 } 5843 5844 static const struct phylink_mac_ops mvpp2_phylink_ops = { 5845 .validate = mvpp2_phylink_validate, 5846 .mac_pcs_get_state = mvpp2_phylink_mac_pcs_get_state, 5847 .mac_an_restart = mvpp2_mac_an_restart, 5848 .mac_config = mvpp2_mac_config, 5849 .mac_link_up = mvpp2_mac_link_up, 5850 .mac_link_down = mvpp2_mac_link_down, 5851 }; 5852 5853 /* Ports initialization */ 5854 static int mvpp2_port_probe(struct platform_device *pdev, 5855 struct fwnode_handle *port_fwnode, 5856 struct mvpp2 *priv) 5857 { 5858 struct phy *comphy = NULL; 5859 struct mvpp2_port *port; 5860 struct mvpp2_port_pcpu *port_pcpu; 5861 struct device_node *port_node = to_of_node(port_fwnode); 5862 netdev_features_t features; 5863 struct net_device *dev; 5864 struct phylink *phylink; 5865 char *mac_from = ""; 5866 unsigned int ntxqs, nrxqs, thread; 5867 unsigned long flags = 0; 5868 bool has_tx_irqs; 5869 u32 id; 5870 int phy_mode; 5871 int err, i; 5872 5873 has_tx_irqs = mvpp2_port_has_irqs(priv, port_node, &flags); 5874 if (!has_tx_irqs && queue_mode == MVPP2_QDIST_MULTI_MODE) { 5875 dev_err(&pdev->dev, 5876 "not enough IRQs to support multi queue mode\n"); 5877 return -EINVAL; 5878 } 5879 5880 ntxqs = MVPP2_MAX_TXQ; 5881 nrxqs = mvpp2_get_nrxqs(priv); 5882 5883 dev = alloc_etherdev_mqs(sizeof(*port), ntxqs, nrxqs); 5884 if (!dev) 5885 return -ENOMEM; 5886 5887 phy_mode = fwnode_get_phy_mode(port_fwnode); 5888 if (phy_mode < 0) { 5889 dev_err(&pdev->dev, "incorrect phy mode\n"); 5890 err = phy_mode; 5891 goto err_free_netdev; 5892 } 5893 5894 /* 5895 * Rewrite 10GBASE-KR to 10GBASE-R for compatibility with existing DT. 5896 * Existing usage of 10GBASE-KR is not correct; no backplane 5897 * negotiation is done, and this driver does not actually support 5898 * 10GBASE-KR. 5899 */ 5900 if (phy_mode == PHY_INTERFACE_MODE_10GKR) 5901 phy_mode = PHY_INTERFACE_MODE_10GBASER; 5902 5903 if (port_node) { 5904 comphy = devm_of_phy_get(&pdev->dev, port_node, NULL); 5905 if (IS_ERR(comphy)) { 5906 if (PTR_ERR(comphy) == -EPROBE_DEFER) { 5907 err = -EPROBE_DEFER; 5908 goto err_free_netdev; 5909 } 5910 comphy = NULL; 5911 } 5912 } 5913 5914 if (fwnode_property_read_u32(port_fwnode, "port-id", &id)) { 5915 err = -EINVAL; 5916 dev_err(&pdev->dev, "missing port-id value\n"); 5917 goto err_free_netdev; 5918 } 5919 5920 dev->tx_queue_len = MVPP2_MAX_TXD_MAX; 5921 dev->watchdog_timeo = 5 * HZ; 5922 dev->netdev_ops = &mvpp2_netdev_ops; 5923 dev->ethtool_ops = &mvpp2_eth_tool_ops; 5924 5925 port = netdev_priv(dev); 5926 port->dev = dev; 5927 port->fwnode = port_fwnode; 5928 port->has_phy = !!of_find_property(port_node, "phy", NULL); 5929 port->ntxqs = ntxqs; 5930 port->nrxqs = nrxqs; 5931 port->priv = priv; 5932 port->has_tx_irqs = has_tx_irqs; 5933 port->flags = flags; 5934 5935 err = mvpp2_queue_vectors_init(port, port_node); 5936 if (err) 5937 goto err_free_netdev; 5938 5939 if (port_node) 5940 port->link_irq = of_irq_get_byname(port_node, "link"); 5941 else 5942 port->link_irq = fwnode_irq_get(port_fwnode, port->nqvecs + 1); 5943 if (port->link_irq == -EPROBE_DEFER) { 5944 err = -EPROBE_DEFER; 5945 goto err_deinit_qvecs; 5946 } 5947 if (port->link_irq <= 0) 5948 /* the link irq is optional */ 5949 port->link_irq = 0; 5950 5951 if (fwnode_property_read_bool(port_fwnode, "marvell,loopback")) 5952 port->flags |= MVPP2_F_LOOPBACK; 5953 5954 port->id = id; 5955 if (priv->hw_version == MVPP21) 5956 port->first_rxq = port->id * port->nrxqs; 5957 else 5958 port->first_rxq = port->id * priv->max_port_rxqs; 5959 5960 port->of_node = port_node; 5961 port->phy_interface = phy_mode; 5962 port->comphy = comphy; 5963 5964 if (priv->hw_version == MVPP21) { 5965 port->base = devm_platform_ioremap_resource(pdev, 2 + id); 5966 if (IS_ERR(port->base)) { 5967 err = PTR_ERR(port->base); 5968 goto err_free_irq; 5969 } 5970 5971 port->stats_base = port->priv->lms_base + 5972 MVPP21_MIB_COUNTERS_OFFSET + 5973 port->gop_id * MVPP21_MIB_COUNTERS_PORT_SZ; 5974 } else { 5975 if (fwnode_property_read_u32(port_fwnode, "gop-port-id", 5976 &port->gop_id)) { 5977 err = -EINVAL; 5978 dev_err(&pdev->dev, "missing gop-port-id value\n"); 5979 goto err_deinit_qvecs; 5980 } 5981 5982 port->base = priv->iface_base + MVPP22_GMAC_BASE(port->gop_id); 5983 port->stats_base = port->priv->iface_base + 5984 MVPP22_MIB_COUNTERS_OFFSET + 5985 port->gop_id * MVPP22_MIB_COUNTERS_PORT_SZ; 5986 } 5987 5988 /* Alloc per-cpu and ethtool stats */ 5989 port->stats = netdev_alloc_pcpu_stats(struct mvpp2_pcpu_stats); 5990 if (!port->stats) { 5991 err = -ENOMEM; 5992 goto err_free_irq; 5993 } 5994 5995 port->ethtool_stats = devm_kcalloc(&pdev->dev, 5996 MVPP2_N_ETHTOOL_STATS(ntxqs, nrxqs), 5997 sizeof(u64), GFP_KERNEL); 5998 if (!port->ethtool_stats) { 5999 err = -ENOMEM; 6000 goto err_free_stats; 6001 } 6002 6003 mutex_init(&port->gather_stats_lock); 6004 INIT_DELAYED_WORK(&port->stats_work, mvpp2_gather_hw_statistics); 6005 6006 mvpp2_port_copy_mac_addr(dev, priv, port_fwnode, &mac_from); 6007 6008 port->tx_ring_size = MVPP2_MAX_TXD_DFLT; 6009 port->rx_ring_size = MVPP2_MAX_RXD_DFLT; 6010 SET_NETDEV_DEV(dev, &pdev->dev); 6011 6012 err = mvpp2_port_init(port); 6013 if (err < 0) { 6014 dev_err(&pdev->dev, "failed to init port %d\n", id); 6015 goto err_free_stats; 6016 } 6017 6018 mvpp2_port_periodic_xon_disable(port); 6019 6020 mvpp2_mac_reset_assert(port); 6021 mvpp22_pcs_reset_assert(port); 6022 6023 port->pcpu = alloc_percpu(struct mvpp2_port_pcpu); 6024 if (!port->pcpu) { 6025 err = -ENOMEM; 6026 goto err_free_txq_pcpu; 6027 } 6028 6029 if (!port->has_tx_irqs) { 6030 for (thread = 0; thread < priv->nthreads; thread++) { 6031 port_pcpu = per_cpu_ptr(port->pcpu, thread); 6032 6033 hrtimer_init(&port_pcpu->tx_done_timer, CLOCK_MONOTONIC, 6034 HRTIMER_MODE_REL_PINNED_SOFT); 6035 port_pcpu->tx_done_timer.function = mvpp2_hr_timer_cb; 6036 port_pcpu->timer_scheduled = false; 6037 port_pcpu->dev = dev; 6038 } 6039 } 6040 6041 features = NETIF_F_SG | NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM | 6042 NETIF_F_TSO; 6043 dev->features = features | NETIF_F_RXCSUM; 6044 dev->hw_features |= features | NETIF_F_RXCSUM | NETIF_F_GRO | 6045 NETIF_F_HW_VLAN_CTAG_FILTER; 6046 6047 if (mvpp22_rss_is_supported()) { 6048 dev->hw_features |= NETIF_F_RXHASH; 6049 dev->features |= NETIF_F_NTUPLE; 6050 } 6051 6052 if (!port->priv->percpu_pools) 6053 mvpp2_set_hw_csum(port, port->pool_long->id); 6054 6055 dev->vlan_features |= features; 6056 dev->gso_max_segs = MVPP2_MAX_TSO_SEGS; 6057 dev->priv_flags |= IFF_UNICAST_FLT; 6058 6059 /* MTU range: 68 - 9704 */ 6060 dev->min_mtu = ETH_MIN_MTU; 6061 /* 9704 == 9728 - 20 and rounding to 8 */ 6062 dev->max_mtu = MVPP2_BM_JUMBO_PKT_SIZE; 6063 dev->dev.of_node = port_node; 6064 6065 /* Phylink isn't used w/ ACPI as of now */ 6066 if (port_node) { 6067 port->phylink_config.dev = &dev->dev; 6068 port->phylink_config.type = PHYLINK_NETDEV; 6069 6070 phylink = phylink_create(&port->phylink_config, port_fwnode, 6071 phy_mode, &mvpp2_phylink_ops); 6072 if (IS_ERR(phylink)) { 6073 err = PTR_ERR(phylink); 6074 goto err_free_port_pcpu; 6075 } 6076 port->phylink = phylink; 6077 } else { 6078 port->phylink = NULL; 6079 } 6080 6081 /* Cycle the comphy to power it down, saving 270mW per port - 6082 * don't worry about an error powering it up. When the comphy 6083 * driver does this, we can remove this code. 6084 */ 6085 if (port->comphy) { 6086 err = mvpp22_comphy_init(port); 6087 if (err == 0) 6088 phy_power_off(port->comphy); 6089 } 6090 6091 err = register_netdev(dev); 6092 if (err < 0) { 6093 dev_err(&pdev->dev, "failed to register netdev\n"); 6094 goto err_phylink; 6095 } 6096 netdev_info(dev, "Using %s mac address %pM\n", mac_from, dev->dev_addr); 6097 6098 priv->port_list[priv->port_count++] = port; 6099 6100 return 0; 6101 6102 err_phylink: 6103 if (port->phylink) 6104 phylink_destroy(port->phylink); 6105 err_free_port_pcpu: 6106 free_percpu(port->pcpu); 6107 err_free_txq_pcpu: 6108 for (i = 0; i < port->ntxqs; i++) 6109 free_percpu(port->txqs[i]->pcpu); 6110 err_free_stats: 6111 free_percpu(port->stats); 6112 err_free_irq: 6113 if (port->link_irq) 6114 irq_dispose_mapping(port->link_irq); 6115 err_deinit_qvecs: 6116 mvpp2_queue_vectors_deinit(port); 6117 err_free_netdev: 6118 free_netdev(dev); 6119 return err; 6120 } 6121 6122 /* Ports removal routine */ 6123 static void mvpp2_port_remove(struct mvpp2_port *port) 6124 { 6125 int i; 6126 6127 unregister_netdev(port->dev); 6128 if (port->phylink) 6129 phylink_destroy(port->phylink); 6130 free_percpu(port->pcpu); 6131 free_percpu(port->stats); 6132 for (i = 0; i < port->ntxqs; i++) 6133 free_percpu(port->txqs[i]->pcpu); 6134 mvpp2_queue_vectors_deinit(port); 6135 if (port->link_irq) 6136 irq_dispose_mapping(port->link_irq); 6137 free_netdev(port->dev); 6138 } 6139 6140 /* Initialize decoding windows */ 6141 static void mvpp2_conf_mbus_windows(const struct mbus_dram_target_info *dram, 6142 struct mvpp2 *priv) 6143 { 6144 u32 win_enable; 6145 int i; 6146 6147 for (i = 0; i < 6; i++) { 6148 mvpp2_write(priv, MVPP2_WIN_BASE(i), 0); 6149 mvpp2_write(priv, MVPP2_WIN_SIZE(i), 0); 6150 6151 if (i < 4) 6152 mvpp2_write(priv, MVPP2_WIN_REMAP(i), 0); 6153 } 6154 6155 win_enable = 0; 6156 6157 for (i = 0; i < dram->num_cs; i++) { 6158 const struct mbus_dram_window *cs = dram->cs + i; 6159 6160 mvpp2_write(priv, MVPP2_WIN_BASE(i), 6161 (cs->base & 0xffff0000) | (cs->mbus_attr << 8) | 6162 dram->mbus_dram_target_id); 6163 6164 mvpp2_write(priv, MVPP2_WIN_SIZE(i), 6165 (cs->size - 1) & 0xffff0000); 6166 6167 win_enable |= (1 << i); 6168 } 6169 6170 mvpp2_write(priv, MVPP2_BASE_ADDR_ENABLE, win_enable); 6171 } 6172 6173 /* Initialize Rx FIFO's */ 6174 static void mvpp2_rx_fifo_init(struct mvpp2 *priv) 6175 { 6176 int port; 6177 6178 for (port = 0; port < MVPP2_MAX_PORTS; port++) { 6179 mvpp2_write(priv, MVPP2_RX_DATA_FIFO_SIZE_REG(port), 6180 MVPP2_RX_FIFO_PORT_DATA_SIZE_4KB); 6181 mvpp2_write(priv, MVPP2_RX_ATTR_FIFO_SIZE_REG(port), 6182 MVPP2_RX_FIFO_PORT_ATTR_SIZE_4KB); 6183 } 6184 6185 mvpp2_write(priv, MVPP2_RX_MIN_PKT_SIZE_REG, 6186 MVPP2_RX_FIFO_PORT_MIN_PKT); 6187 mvpp2_write(priv, MVPP2_RX_FIFO_INIT_REG, 0x1); 6188 } 6189 6190 static void mvpp22_rx_fifo_init(struct mvpp2 *priv) 6191 { 6192 int port; 6193 6194 /* The FIFO size parameters are set depending on the maximum speed a 6195 * given port can handle: 6196 * - Port 0: 10Gbps 6197 * - Port 1: 2.5Gbps 6198 * - Ports 2 and 3: 1Gbps 6199 */ 6200 6201 mvpp2_write(priv, MVPP2_RX_DATA_FIFO_SIZE_REG(0), 6202 MVPP2_RX_FIFO_PORT_DATA_SIZE_32KB); 6203 mvpp2_write(priv, MVPP2_RX_ATTR_FIFO_SIZE_REG(0), 6204 MVPP2_RX_FIFO_PORT_ATTR_SIZE_32KB); 6205 6206 mvpp2_write(priv, MVPP2_RX_DATA_FIFO_SIZE_REG(1), 6207 MVPP2_RX_FIFO_PORT_DATA_SIZE_8KB); 6208 mvpp2_write(priv, MVPP2_RX_ATTR_FIFO_SIZE_REG(1), 6209 MVPP2_RX_FIFO_PORT_ATTR_SIZE_8KB); 6210 6211 for (port = 2; port < MVPP2_MAX_PORTS; port++) { 6212 mvpp2_write(priv, MVPP2_RX_DATA_FIFO_SIZE_REG(port), 6213 MVPP2_RX_FIFO_PORT_DATA_SIZE_4KB); 6214 mvpp2_write(priv, MVPP2_RX_ATTR_FIFO_SIZE_REG(port), 6215 MVPP2_RX_FIFO_PORT_ATTR_SIZE_4KB); 6216 } 6217 6218 mvpp2_write(priv, MVPP2_RX_MIN_PKT_SIZE_REG, 6219 MVPP2_RX_FIFO_PORT_MIN_PKT); 6220 mvpp2_write(priv, MVPP2_RX_FIFO_INIT_REG, 0x1); 6221 } 6222 6223 /* Initialize Tx FIFO's: the total FIFO size is 19kB on PPv2.2 and 10G 6224 * interfaces must have a Tx FIFO size of 10kB. As only port 0 can do 10G, 6225 * configure its Tx FIFO size to 10kB and the others ports Tx FIFO size to 3kB. 6226 */ 6227 static void mvpp22_tx_fifo_init(struct mvpp2 *priv) 6228 { 6229 int port, size, thrs; 6230 6231 for (port = 0; port < MVPP2_MAX_PORTS; port++) { 6232 if (port == 0) { 6233 size = MVPP22_TX_FIFO_DATA_SIZE_10KB; 6234 thrs = MVPP2_TX_FIFO_THRESHOLD_10KB; 6235 } else { 6236 size = MVPP22_TX_FIFO_DATA_SIZE_3KB; 6237 thrs = MVPP2_TX_FIFO_THRESHOLD_3KB; 6238 } 6239 mvpp2_write(priv, MVPP22_TX_FIFO_SIZE_REG(port), size); 6240 mvpp2_write(priv, MVPP22_TX_FIFO_THRESH_REG(port), thrs); 6241 } 6242 } 6243 6244 static void mvpp2_axi_init(struct mvpp2 *priv) 6245 { 6246 u32 val, rdval, wrval; 6247 6248 mvpp2_write(priv, MVPP22_BM_ADDR_HIGH_RLS_REG, 0x0); 6249 6250 /* AXI Bridge Configuration */ 6251 6252 rdval = MVPP22_AXI_CODE_CACHE_RD_CACHE 6253 << MVPP22_AXI_ATTR_CACHE_OFFS; 6254 rdval |= MVPP22_AXI_CODE_DOMAIN_OUTER_DOM 6255 << MVPP22_AXI_ATTR_DOMAIN_OFFS; 6256 6257 wrval = MVPP22_AXI_CODE_CACHE_WR_CACHE 6258 << MVPP22_AXI_ATTR_CACHE_OFFS; 6259 wrval |= MVPP22_AXI_CODE_DOMAIN_OUTER_DOM 6260 << MVPP22_AXI_ATTR_DOMAIN_OFFS; 6261 6262 /* BM */ 6263 mvpp2_write(priv, MVPP22_AXI_BM_WR_ATTR_REG, wrval); 6264 mvpp2_write(priv, MVPP22_AXI_BM_RD_ATTR_REG, rdval); 6265 6266 /* Descriptors */ 6267 mvpp2_write(priv, MVPP22_AXI_AGGRQ_DESCR_RD_ATTR_REG, rdval); 6268 mvpp2_write(priv, MVPP22_AXI_TXQ_DESCR_WR_ATTR_REG, wrval); 6269 mvpp2_write(priv, MVPP22_AXI_TXQ_DESCR_RD_ATTR_REG, rdval); 6270 mvpp2_write(priv, MVPP22_AXI_RXQ_DESCR_WR_ATTR_REG, wrval); 6271 6272 /* Buffer Data */ 6273 mvpp2_write(priv, MVPP22_AXI_TX_DATA_RD_ATTR_REG, rdval); 6274 mvpp2_write(priv, MVPP22_AXI_RX_DATA_WR_ATTR_REG, wrval); 6275 6276 val = MVPP22_AXI_CODE_CACHE_NON_CACHE 6277 << MVPP22_AXI_CODE_CACHE_OFFS; 6278 val |= MVPP22_AXI_CODE_DOMAIN_SYSTEM 6279 << MVPP22_AXI_CODE_DOMAIN_OFFS; 6280 mvpp2_write(priv, MVPP22_AXI_RD_NORMAL_CODE_REG, val); 6281 mvpp2_write(priv, MVPP22_AXI_WR_NORMAL_CODE_REG, val); 6282 6283 val = MVPP22_AXI_CODE_CACHE_RD_CACHE 6284 << MVPP22_AXI_CODE_CACHE_OFFS; 6285 val |= MVPP22_AXI_CODE_DOMAIN_OUTER_DOM 6286 << MVPP22_AXI_CODE_DOMAIN_OFFS; 6287 6288 mvpp2_write(priv, MVPP22_AXI_RD_SNOOP_CODE_REG, val); 6289 6290 val = MVPP22_AXI_CODE_CACHE_WR_CACHE 6291 << MVPP22_AXI_CODE_CACHE_OFFS; 6292 val |= MVPP22_AXI_CODE_DOMAIN_OUTER_DOM 6293 << MVPP22_AXI_CODE_DOMAIN_OFFS; 6294 6295 mvpp2_write(priv, MVPP22_AXI_WR_SNOOP_CODE_REG, val); 6296 } 6297 6298 /* Initialize network controller common part HW */ 6299 static int mvpp2_init(struct platform_device *pdev, struct mvpp2 *priv) 6300 { 6301 const struct mbus_dram_target_info *dram_target_info; 6302 int err, i; 6303 u32 val; 6304 6305 /* MBUS windows configuration */ 6306 dram_target_info = mv_mbus_dram_info(); 6307 if (dram_target_info) 6308 mvpp2_conf_mbus_windows(dram_target_info, priv); 6309 6310 if (priv->hw_version == MVPP22) 6311 mvpp2_axi_init(priv); 6312 6313 /* Disable HW PHY polling */ 6314 if (priv->hw_version == MVPP21) { 6315 val = readl(priv->lms_base + MVPP2_PHY_AN_CFG0_REG); 6316 val |= MVPP2_PHY_AN_STOP_SMI0_MASK; 6317 writel(val, priv->lms_base + MVPP2_PHY_AN_CFG0_REG); 6318 } else { 6319 val = readl(priv->iface_base + MVPP22_SMI_MISC_CFG_REG); 6320 val &= ~MVPP22_SMI_POLLING_EN; 6321 writel(val, priv->iface_base + MVPP22_SMI_MISC_CFG_REG); 6322 } 6323 6324 /* Allocate and initialize aggregated TXQs */ 6325 priv->aggr_txqs = devm_kcalloc(&pdev->dev, MVPP2_MAX_THREADS, 6326 sizeof(*priv->aggr_txqs), 6327 GFP_KERNEL); 6328 if (!priv->aggr_txqs) 6329 return -ENOMEM; 6330 6331 for (i = 0; i < MVPP2_MAX_THREADS; i++) { 6332 priv->aggr_txqs[i].id = i; 6333 priv->aggr_txqs[i].size = MVPP2_AGGR_TXQ_SIZE; 6334 err = mvpp2_aggr_txq_init(pdev, &priv->aggr_txqs[i], i, priv); 6335 if (err < 0) 6336 return err; 6337 } 6338 6339 /* Fifo Init */ 6340 if (priv->hw_version == MVPP21) { 6341 mvpp2_rx_fifo_init(priv); 6342 } else { 6343 mvpp22_rx_fifo_init(priv); 6344 mvpp22_tx_fifo_init(priv); 6345 } 6346 6347 if (priv->hw_version == MVPP21) 6348 writel(MVPP2_EXT_GLOBAL_CTRL_DEFAULT, 6349 priv->lms_base + MVPP2_MNG_EXTENDED_GLOBAL_CTRL_REG); 6350 6351 /* Allow cache snoop when transmiting packets */ 6352 mvpp2_write(priv, MVPP2_TX_SNOOP_REG, 0x1); 6353 6354 /* Buffer Manager initialization */ 6355 err = mvpp2_bm_init(&pdev->dev, priv); 6356 if (err < 0) 6357 return err; 6358 6359 /* Parser default initialization */ 6360 err = mvpp2_prs_default_init(pdev, priv); 6361 if (err < 0) 6362 return err; 6363 6364 /* Classifier default initialization */ 6365 mvpp2_cls_init(priv); 6366 6367 return 0; 6368 } 6369 6370 static int mvpp2_probe(struct platform_device *pdev) 6371 { 6372 const struct acpi_device_id *acpi_id; 6373 struct fwnode_handle *fwnode = pdev->dev.fwnode; 6374 struct fwnode_handle *port_fwnode; 6375 struct mvpp2 *priv; 6376 struct resource *res; 6377 void __iomem *base; 6378 int i, shared; 6379 int err; 6380 6381 priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL); 6382 if (!priv) 6383 return -ENOMEM; 6384 6385 if (has_acpi_companion(&pdev->dev)) { 6386 acpi_id = acpi_match_device(pdev->dev.driver->acpi_match_table, 6387 &pdev->dev); 6388 if (!acpi_id) 6389 return -EINVAL; 6390 priv->hw_version = (unsigned long)acpi_id->driver_data; 6391 } else { 6392 priv->hw_version = 6393 (unsigned long)of_device_get_match_data(&pdev->dev); 6394 } 6395 6396 /* multi queue mode isn't supported on PPV2.1, fallback to single 6397 * mode 6398 */ 6399 if (priv->hw_version == MVPP21) 6400 queue_mode = MVPP2_QDIST_SINGLE_MODE; 6401 6402 base = devm_platform_ioremap_resource(pdev, 0); 6403 if (IS_ERR(base)) 6404 return PTR_ERR(base); 6405 6406 if (priv->hw_version == MVPP21) { 6407 priv->lms_base = devm_platform_ioremap_resource(pdev, 1); 6408 if (IS_ERR(priv->lms_base)) 6409 return PTR_ERR(priv->lms_base); 6410 } else { 6411 res = platform_get_resource(pdev, IORESOURCE_MEM, 1); 6412 if (has_acpi_companion(&pdev->dev)) { 6413 /* In case the MDIO memory region is declared in 6414 * the ACPI, it can already appear as 'in-use' 6415 * in the OS. Because it is overlapped by second 6416 * region of the network controller, make 6417 * sure it is released, before requesting it again. 6418 * The care is taken by mvpp2 driver to avoid 6419 * concurrent access to this memory region. 6420 */ 6421 release_resource(res); 6422 } 6423 priv->iface_base = devm_ioremap_resource(&pdev->dev, res); 6424 if (IS_ERR(priv->iface_base)) 6425 return PTR_ERR(priv->iface_base); 6426 } 6427 6428 if (priv->hw_version == MVPP22 && dev_of_node(&pdev->dev)) { 6429 priv->sysctrl_base = 6430 syscon_regmap_lookup_by_phandle(pdev->dev.of_node, 6431 "marvell,system-controller"); 6432 if (IS_ERR(priv->sysctrl_base)) 6433 /* The system controller regmap is optional for dt 6434 * compatibility reasons. When not provided, the 6435 * configuration of the GoP relies on the 6436 * firmware/bootloader. 6437 */ 6438 priv->sysctrl_base = NULL; 6439 } 6440 6441 if (priv->hw_version == MVPP22 && 6442 mvpp2_get_nrxqs(priv) * 2 <= MVPP2_BM_MAX_POOLS) 6443 priv->percpu_pools = 1; 6444 6445 mvpp2_setup_bm_pool(); 6446 6447 6448 priv->nthreads = min_t(unsigned int, num_present_cpus(), 6449 MVPP2_MAX_THREADS); 6450 6451 shared = num_present_cpus() - priv->nthreads; 6452 if (shared > 0) 6453 bitmap_fill(&priv->lock_map, 6454 min_t(int, shared, MVPP2_MAX_THREADS)); 6455 6456 for (i = 0; i < MVPP2_MAX_THREADS; i++) { 6457 u32 addr_space_sz; 6458 6459 addr_space_sz = (priv->hw_version == MVPP21 ? 6460 MVPP21_ADDR_SPACE_SZ : MVPP22_ADDR_SPACE_SZ); 6461 priv->swth_base[i] = base + i * addr_space_sz; 6462 } 6463 6464 if (priv->hw_version == MVPP21) 6465 priv->max_port_rxqs = 8; 6466 else 6467 priv->max_port_rxqs = 32; 6468 6469 if (dev_of_node(&pdev->dev)) { 6470 priv->pp_clk = devm_clk_get(&pdev->dev, "pp_clk"); 6471 if (IS_ERR(priv->pp_clk)) 6472 return PTR_ERR(priv->pp_clk); 6473 err = clk_prepare_enable(priv->pp_clk); 6474 if (err < 0) 6475 return err; 6476 6477 priv->gop_clk = devm_clk_get(&pdev->dev, "gop_clk"); 6478 if (IS_ERR(priv->gop_clk)) { 6479 err = PTR_ERR(priv->gop_clk); 6480 goto err_pp_clk; 6481 } 6482 err = clk_prepare_enable(priv->gop_clk); 6483 if (err < 0) 6484 goto err_pp_clk; 6485 6486 if (priv->hw_version == MVPP22) { 6487 priv->mg_clk = devm_clk_get(&pdev->dev, "mg_clk"); 6488 if (IS_ERR(priv->mg_clk)) { 6489 err = PTR_ERR(priv->mg_clk); 6490 goto err_gop_clk; 6491 } 6492 6493 err = clk_prepare_enable(priv->mg_clk); 6494 if (err < 0) 6495 goto err_gop_clk; 6496 6497 priv->mg_core_clk = devm_clk_get(&pdev->dev, "mg_core_clk"); 6498 if (IS_ERR(priv->mg_core_clk)) { 6499 priv->mg_core_clk = NULL; 6500 } else { 6501 err = clk_prepare_enable(priv->mg_core_clk); 6502 if (err < 0) 6503 goto err_mg_clk; 6504 } 6505 } 6506 6507 priv->axi_clk = devm_clk_get(&pdev->dev, "axi_clk"); 6508 if (IS_ERR(priv->axi_clk)) { 6509 err = PTR_ERR(priv->axi_clk); 6510 if (err == -EPROBE_DEFER) 6511 goto err_mg_core_clk; 6512 priv->axi_clk = NULL; 6513 } else { 6514 err = clk_prepare_enable(priv->axi_clk); 6515 if (err < 0) 6516 goto err_mg_core_clk; 6517 } 6518 6519 /* Get system's tclk rate */ 6520 priv->tclk = clk_get_rate(priv->pp_clk); 6521 } else if (device_property_read_u32(&pdev->dev, "clock-frequency", 6522 &priv->tclk)) { 6523 dev_err(&pdev->dev, "missing clock-frequency value\n"); 6524 return -EINVAL; 6525 } 6526 6527 if (priv->hw_version == MVPP22) { 6528 err = dma_set_mask(&pdev->dev, MVPP2_DESC_DMA_MASK); 6529 if (err) 6530 goto err_axi_clk; 6531 /* Sadly, the BM pools all share the same register to 6532 * store the high 32 bits of their address. So they 6533 * must all have the same high 32 bits, which forces 6534 * us to restrict coherent memory to DMA_BIT_MASK(32). 6535 */ 6536 err = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32)); 6537 if (err) 6538 goto err_axi_clk; 6539 } 6540 6541 /* Initialize network controller */ 6542 err = mvpp2_init(pdev, priv); 6543 if (err < 0) { 6544 dev_err(&pdev->dev, "failed to initialize controller\n"); 6545 goto err_axi_clk; 6546 } 6547 6548 /* Initialize ports */ 6549 fwnode_for_each_available_child_node(fwnode, port_fwnode) { 6550 err = mvpp2_port_probe(pdev, port_fwnode, priv); 6551 if (err < 0) 6552 goto err_port_probe; 6553 } 6554 6555 if (priv->port_count == 0) { 6556 dev_err(&pdev->dev, "no ports enabled\n"); 6557 err = -ENODEV; 6558 goto err_axi_clk; 6559 } 6560 6561 /* Statistics must be gathered regularly because some of them (like 6562 * packets counters) are 32-bit registers and could overflow quite 6563 * quickly. For instance, a 10Gb link used at full bandwidth with the 6564 * smallest packets (64B) will overflow a 32-bit counter in less than 6565 * 30 seconds. Then, use a workqueue to fill 64-bit counters. 6566 */ 6567 snprintf(priv->queue_name, sizeof(priv->queue_name), 6568 "stats-wq-%s%s", netdev_name(priv->port_list[0]->dev), 6569 priv->port_count > 1 ? "+" : ""); 6570 priv->stats_queue = create_singlethread_workqueue(priv->queue_name); 6571 if (!priv->stats_queue) { 6572 err = -ENOMEM; 6573 goto err_port_probe; 6574 } 6575 6576 mvpp2_dbgfs_init(priv, pdev->name); 6577 6578 platform_set_drvdata(pdev, priv); 6579 return 0; 6580 6581 err_port_probe: 6582 i = 0; 6583 fwnode_for_each_available_child_node(fwnode, port_fwnode) { 6584 if (priv->port_list[i]) 6585 mvpp2_port_remove(priv->port_list[i]); 6586 i++; 6587 } 6588 err_axi_clk: 6589 clk_disable_unprepare(priv->axi_clk); 6590 6591 err_mg_core_clk: 6592 if (priv->hw_version == MVPP22) 6593 clk_disable_unprepare(priv->mg_core_clk); 6594 err_mg_clk: 6595 if (priv->hw_version == MVPP22) 6596 clk_disable_unprepare(priv->mg_clk); 6597 err_gop_clk: 6598 clk_disable_unprepare(priv->gop_clk); 6599 err_pp_clk: 6600 clk_disable_unprepare(priv->pp_clk); 6601 return err; 6602 } 6603 6604 static int mvpp2_remove(struct platform_device *pdev) 6605 { 6606 struct mvpp2 *priv = platform_get_drvdata(pdev); 6607 struct fwnode_handle *fwnode = pdev->dev.fwnode; 6608 int i = 0, poolnum = MVPP2_BM_POOLS_NUM; 6609 struct fwnode_handle *port_fwnode; 6610 6611 mvpp2_dbgfs_cleanup(priv); 6612 6613 fwnode_for_each_available_child_node(fwnode, port_fwnode) { 6614 if (priv->port_list[i]) { 6615 mutex_destroy(&priv->port_list[i]->gather_stats_lock); 6616 mvpp2_port_remove(priv->port_list[i]); 6617 } 6618 i++; 6619 } 6620 6621 destroy_workqueue(priv->stats_queue); 6622 6623 if (priv->percpu_pools) 6624 poolnum = mvpp2_get_nrxqs(priv) * 2; 6625 6626 for (i = 0; i < poolnum; i++) { 6627 struct mvpp2_bm_pool *bm_pool = &priv->bm_pools[i]; 6628 6629 mvpp2_bm_pool_destroy(&pdev->dev, priv, bm_pool); 6630 } 6631 6632 for (i = 0; i < MVPP2_MAX_THREADS; i++) { 6633 struct mvpp2_tx_queue *aggr_txq = &priv->aggr_txqs[i]; 6634 6635 dma_free_coherent(&pdev->dev, 6636 MVPP2_AGGR_TXQ_SIZE * MVPP2_DESC_ALIGNED_SIZE, 6637 aggr_txq->descs, 6638 aggr_txq->descs_dma); 6639 } 6640 6641 if (is_acpi_node(port_fwnode)) 6642 return 0; 6643 6644 clk_disable_unprepare(priv->axi_clk); 6645 clk_disable_unprepare(priv->mg_core_clk); 6646 clk_disable_unprepare(priv->mg_clk); 6647 clk_disable_unprepare(priv->pp_clk); 6648 clk_disable_unprepare(priv->gop_clk); 6649 6650 return 0; 6651 } 6652 6653 static const struct of_device_id mvpp2_match[] = { 6654 { 6655 .compatible = "marvell,armada-375-pp2", 6656 .data = (void *)MVPP21, 6657 }, 6658 { 6659 .compatible = "marvell,armada-7k-pp22", 6660 .data = (void *)MVPP22, 6661 }, 6662 { } 6663 }; 6664 MODULE_DEVICE_TABLE(of, mvpp2_match); 6665 6666 static const struct acpi_device_id mvpp2_acpi_match[] = { 6667 { "MRVL0110", MVPP22 }, 6668 { }, 6669 }; 6670 MODULE_DEVICE_TABLE(acpi, mvpp2_acpi_match); 6671 6672 static struct platform_driver mvpp2_driver = { 6673 .probe = mvpp2_probe, 6674 .remove = mvpp2_remove, 6675 .driver = { 6676 .name = MVPP2_DRIVER_NAME, 6677 .of_match_table = mvpp2_match, 6678 .acpi_match_table = ACPI_PTR(mvpp2_acpi_match), 6679 }, 6680 }; 6681 6682 module_platform_driver(mvpp2_driver); 6683 6684 MODULE_DESCRIPTION("Marvell PPv2 Ethernet Driver - www.marvell.com"); 6685 MODULE_AUTHOR("Marcin Wojtas <mw@semihalf.com>"); 6686 MODULE_LICENSE("GPL v2"); 6687