drivers/net/ethernet/hisilicon/hisi_femac.c

   1 /*
   2  * Hisilicon Fast Ethernet MAC Driver
   3  *
   4  * Copyright (c) 2016 HiSilicon Technologies Co., Ltd.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program. If not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #include <linux/circ_buf.h>
  21 #include <linux/clk.h>
  22 #include <linux/etherdevice.h>
  23 #include <linux/interrupt.h>
  24 #include <linux/module.h>
  25 #include <linux/of_mdio.h>
  26 #include <linux/of_net.h>
  27 #include <linux/platform_device.h>
  28 #include <linux/reset.h>
  29
  30 /* MAC control register list */
  31 #define MAC_PORTSEL                     0x0200
  32 #define MAC_PORTSEL_STAT_CPU            BIT(0)
  33 #define MAC_PORTSEL_RMII                BIT(1)
  34 #define MAC_PORTSET                     0x0208
  35 #define MAC_PORTSET_DUPLEX_FULL         BIT(0)
  36 #define MAC_PORTSET_LINKED              BIT(1)
  37 #define MAC_PORTSET_SPEED_100M          BIT(2)
  38 #define MAC_SET                         0x0210
  39 #define MAX_FRAME_SIZE                  1600
  40 #define MAX_FRAME_SIZE_MASK             GENMASK(10, 0)
  41 #define BIT_PAUSE_EN                    BIT(18)
  42 #define RX_COALESCE_SET                 0x0340
  43 #define RX_COALESCED_FRAME_OFFSET       24
  44 #define RX_COALESCED_FRAMES             8
  45 #define RX_COALESCED_TIMER              0x74
  46 #define QLEN_SET                        0x0344
  47 #define RX_DEPTH_OFFSET                 8
  48 #define MAX_HW_FIFO_DEPTH               64
  49 #define HW_TX_FIFO_DEPTH                12
  50 #define HW_RX_FIFO_DEPTH                (MAX_HW_FIFO_DEPTH - HW_TX_FIFO_DEPTH)
  51 #define IQFRM_DES                       0x0354
  52 #define RX_FRAME_LEN_MASK               GENMASK(11, 0)
  53 #define IQ_ADDR                         0x0358
  54 #define EQ_ADDR                         0x0360
  55 #define EQFRM_LEN                       0x0364
  56 #define ADDRQ_STAT                      0x036C
  57 #define TX_CNT_INUSE_MASK               GENMASK(5, 0)
  58 #define BIT_TX_READY                    BIT(24)
  59 #define BIT_RX_READY                    BIT(25)
  60 /* global control register list */
  61 #define GLB_HOSTMAC_L32                 0x0000
  62 #define GLB_HOSTMAC_H16                 0x0004
  63 #define GLB_SOFT_RESET                  0x0008
  64 #define SOFT_RESET_ALL                  BIT(0)
  65 #define GLB_FWCTRL                      0x0010
  66 #define FWCTRL_VLAN_ENABLE              BIT(0)
  67 #define FWCTRL_FW2CPU_ENA               BIT(5)
  68 #define FWCTRL_FWALL2CPU                BIT(7)
  69 #define GLB_MACTCTRL                    0x0014
  70 #define MACTCTRL_UNI2CPU                BIT(1)
  71 #define MACTCTRL_MULTI2CPU              BIT(3)
  72 #define MACTCTRL_BROAD2CPU              BIT(5)
  73 #define MACTCTRL_MACT_ENA               BIT(7)
  74 #define GLB_IRQ_STAT                    0x0030
  75 #define GLB_IRQ_ENA                     0x0034
  76 #define IRQ_ENA_PORT0_MASK              GENMASK(7, 0)
  77 #define IRQ_ENA_PORT0                   BIT(18)
  78 #define IRQ_ENA_ALL                     BIT(19)
  79 #define GLB_IRQ_RAW                     0x0038
  80 #define IRQ_INT_RX_RDY                  BIT(0)
  81 #define IRQ_INT_TX_PER_PACKET           BIT(1)
  82 #define IRQ_INT_TX_FIFO_EMPTY           BIT(6)
  83 #define IRQ_INT_MULTI_RXRDY             BIT(7)
  84 #define DEF_INT_MASK                    (IRQ_INT_MULTI_RXRDY | \
  85                                         IRQ_INT_TX_PER_PACKET | \
  86                                         IRQ_INT_TX_FIFO_EMPTY)
  87 #define GLB_MAC_L32_BASE                0x0100
  88 #define GLB_MAC_H16_BASE                0x0104
  89 #define MACFLT_HI16_MASK                GENMASK(15, 0)
  90 #define BIT_MACFLT_ENA                  BIT(17)
  91 #define BIT_MACFLT_FW2CPU               BIT(21)
  92 #define GLB_MAC_H16(reg)                (GLB_MAC_H16_BASE + ((reg) * 0x8))
  93 #define GLB_MAC_L32(reg)                (GLB_MAC_L32_BASE + ((reg) * 0x8))
  94 #define MAX_MAC_FILTER_NUM              8
  95 #define MAX_UNICAST_ADDRESSES           2
  96 #define MAX_MULTICAST_ADDRESSES         (MAX_MAC_FILTER_NUM - \
  97                                         MAX_UNICAST_ADDRESSES)
  98 /* software tx and rx queue number, should be power of 2 */
  99 #define TXQ_NUM                         64
 100 #define RXQ_NUM                         128
 101 #define FEMAC_POLL_WEIGHT               16
 102
 103 #define PHY_RESET_DELAYS_PROPERTY       "hisilicon,phy-reset-delays-us"
 104
 105 enum phy_reset_delays {
 106         PRE_DELAY,
 107         PULSE,
 108         POST_DELAY,
 109         DELAYS_NUM,
 110 };
 111
 112 struct hisi_femac_queue {
 113         struct sk_buff **skb;
 114         dma_addr_t *dma_phys;
 115         int num;
 116         unsigned int head;
 117         unsigned int tail;
 118 };
 119
 120 struct hisi_femac_priv {
 121         void __iomem *port_base;
 122         void __iomem *glb_base;
 123         struct clk *clk;
 124         struct reset_control *mac_rst;
 125         struct reset_control *phy_rst;
 126         u32 phy_reset_delays[DELAYS_NUM];
 127         u32 link_status;
 128
 129         struct device *dev;
 130         struct net_device *ndev;
 131
 132         struct hisi_femac_queue txq;
 133         struct hisi_femac_queue rxq;
 134         u32 tx_fifo_used_cnt;
 135         struct napi_struct napi;
 136 };
 137
 138 static void hisi_femac_irq_enable(struct hisi_femac_priv *priv, int irqs)
 139 {
 140         u32 val;
 141
 142         val = readl(priv->glb_base + GLB_IRQ_ENA);
 143         writel(val | irqs, priv->glb_base + GLB_IRQ_ENA);
 144 }
 145
 146 static void hisi_femac_irq_disable(struct hisi_femac_priv *priv, int irqs)
 147 {
 148         u32 val;
 149
 150         val = readl(priv->glb_base + GLB_IRQ_ENA);
 151         writel(val & (~irqs), priv->glb_base + GLB_IRQ_ENA);
 152 }
 153
 154 static void hisi_femac_tx_dma_unmap(struct hisi_femac_priv *priv,
 155                                     struct sk_buff *skb, unsigned int pos)
 156 {
 157         dma_addr_t dma_addr;
 158
 159         dma_addr = priv->txq.dma_phys[pos];
 160         dma_unmap_single(priv->dev, dma_addr, skb->len, DMA_TO_DEVICE);
 161 }
 162
 163 static void hisi_femac_xmit_reclaim(struct net_device *dev)
 164 {
 165         struct sk_buff *skb;
 166         struct hisi_femac_priv *priv = netdev_priv(dev);
 167         struct hisi_femac_queue *txq = &priv->txq;
 168         unsigned int bytes_compl = 0, pkts_compl = 0;
 169         u32 val;
 170
 171         netif_tx_lock(dev);
 172
 173         val = readl(priv->port_base + ADDRQ_STAT) & TX_CNT_INUSE_MASK;
 174         while (val < priv->tx_fifo_used_cnt) {
 175                 skb = txq->skb[txq->tail];
 176                 if (unlikely(!skb)) {
 177                         netdev_err(dev, "xmitq_cnt_inuse=%d, tx_fifo_used=%d\n",
 178                                    val, priv->tx_fifo_used_cnt);
 179                         break;
 180                 }
 181                 hisi_femac_tx_dma_unmap(priv, skb, txq->tail);
 182                 pkts_compl++;
 183                 bytes_compl += skb->len;
 184                 dev_kfree_skb_any(skb);
 185
 186                 priv->tx_fifo_used_cnt--;
 187
 188                 val = readl(priv->port_base + ADDRQ_STAT) & TX_CNT_INUSE_MASK;
 189                 txq->skb[txq->tail] = NULL;
 190                 txq->tail = (txq->tail + 1) % txq->num;
 191         }
 192
 193         netdev_completed_queue(dev, pkts_compl, bytes_compl);
 194
 195         if (unlikely(netif_queue_stopped(dev)) && pkts_compl)
 196                 netif_wake_queue(dev);
 197
 198         netif_tx_unlock(dev);
 199 }
 200
 201 static void hisi_femac_adjust_link(struct net_device *dev)
 202 {
 203         struct hisi_femac_priv *priv = netdev_priv(dev);
 204         struct phy_device *phy = dev->phydev;
 205         u32 status = 0;
 206
 207         if (phy->link)
 208                 status |= MAC_PORTSET_LINKED;
 209         if (phy->duplex == DUPLEX_FULL)
 210                 status |= MAC_PORTSET_DUPLEX_FULL;
 211         if (phy->speed == SPEED_100)
 212                 status |= MAC_PORTSET_SPEED_100M;
 213
 214         if ((status != priv->link_status) &&
 215             ((status | priv->link_status) & MAC_PORTSET_LINKED)) {
 216                 writel(status, priv->port_base + MAC_PORTSET);
 217                 priv->link_status = status;
 218                 phy_print_status(phy);
 219         }
 220 }
 221
 222 static void hisi_femac_rx_refill(struct hisi_femac_priv *priv)
 223 {
 224         struct hisi_femac_queue *rxq = &priv->rxq;
 225         struct sk_buff *skb;
 226         u32 pos;
 227         u32 len = MAX_FRAME_SIZE;
 228         dma_addr_t addr;
 229
 230         pos = rxq->head;
 231         while (readl(priv->port_base + ADDRQ_STAT) & BIT_RX_READY) {
 232                 if (!CIRC_SPACE(pos, rxq->tail, rxq->num))
 233                         break;
 234                 if (unlikely(rxq->skb[pos])) {
 235                         netdev_err(priv->ndev, "err skb[%d]=%p\n",
 236                                    pos, rxq->skb[pos]);
 237                         break;
 238                 }
 239                 skb = netdev_alloc_skb_ip_align(priv->ndev, len);
 240                 if (unlikely(!skb))
 241                         break;
 242
 243                 addr = dma_map_single(priv->dev, skb->data, len,
 244                                       DMA_FROM_DEVICE);
 245                 if (dma_mapping_error(priv->dev, addr)) {
 246                         dev_kfree_skb_any(skb);
 247                         break;
 248                 }
 249                 rxq->dma_phys[pos] = addr;
 250                 rxq->skb[pos] = skb;
 251                 writel(addr, priv->port_base + IQ_ADDR);
 252                 pos = (pos + 1) % rxq->num;
 253         }
 254         rxq->head = pos;
 255 }
 256
 257 static int hisi_femac_rx(struct net_device *dev, int limit)
 258 {
 259         struct hisi_femac_priv *priv = netdev_priv(dev);
 260         struct hisi_femac_queue *rxq = &priv->rxq;
 261         struct sk_buff *skb;
 262         dma_addr_t addr;
 263         u32 rx_pkt_info, pos, len, rx_pkts_num = 0;
 264
 265         pos = rxq->tail;
 266         while (readl(priv->glb_base + GLB_IRQ_RAW) & IRQ_INT_RX_RDY) {
 267                 rx_pkt_info = readl(priv->port_base + IQFRM_DES);
 268                 len = rx_pkt_info & RX_FRAME_LEN_MASK;
 269                 len -= ETH_FCS_LEN;
 270
 271                 /* tell hardware we will deal with this packet */
 272                 writel(IRQ_INT_RX_RDY, priv->glb_base + GLB_IRQ_RAW);
 273
 274                 rx_pkts_num++;
 275
 276                 skb = rxq->skb[pos];
 277                 if (unlikely(!skb)) {
 278                         netdev_err(dev, "rx skb NULL. pos=%d\n", pos);
 279                         break;
 280                 }
 281                 rxq->skb[pos] = NULL;
 282
 283                 addr = rxq->dma_phys[pos];
 284                 dma_unmap_single(priv->dev, addr, MAX_FRAME_SIZE,
 285                                  DMA_FROM_DEVICE);
 286                 skb_put(skb, len);
 287                 if (unlikely(skb->len > MAX_FRAME_SIZE)) {
 288                         netdev_err(dev, "rcv len err, len = %d\n", skb->len);
 289                         dev->stats.rx_errors++;
 290                         dev->stats.rx_length_errors++;
 291                         dev_kfree_skb_any(skb);
 292                         goto next;
 293                 }
 294
 295                 skb->protocol = eth_type_trans(skb, dev);
 296                 napi_gro_receive(&priv->napi, skb);
 297                 dev->stats.rx_packets++;
 298                 dev->stats.rx_bytes += skb->len;
 299 next:
 300                 pos = (pos + 1) % rxq->num;
 301                 if (rx_pkts_num >= limit)
 302                         break;
 303         }
 304         rxq->tail = pos;
 305
 306         hisi_femac_rx_refill(priv);
 307
 308         return rx_pkts_num;
 309 }
 310
 311 static int hisi_femac_poll(struct napi_struct *napi, int budget)
 312 {
 313         struct hisi_femac_priv *priv = container_of(napi,
 314                                         struct hisi_femac_priv, napi);
 315         struct net_device *dev = priv->ndev;
 316         int work_done = 0, task = budget;
 317         int ints, num;
 318
 319         do {
 320                 hisi_femac_xmit_reclaim(dev);
 321                 num = hisi_femac_rx(dev, task);
 322                 work_done += num;
 323                 task -= num;
 324                 if (work_done >= budget)
 325                         break;
 326
 327                 ints = readl(priv->glb_base + GLB_IRQ_RAW);
 328                 writel(ints & DEF_INT_MASK,
 329                        priv->glb_base + GLB_IRQ_RAW);
 330         } while (ints & DEF_INT_MASK);
 331
 332         if (work_done < budget) {
 333                 napi_complete_done(napi, work_done);
 334                 hisi_femac_irq_enable(priv, DEF_INT_MASK &
 335                                         (~IRQ_INT_TX_PER_PACKET));
 336         }
 337
 338         return work_done;
 339 }
 340
 341 static irqreturn_t hisi_femac_interrupt(int irq, void *dev_id)
 342 {
 343         int ints;
 344         struct net_device *dev = (struct net_device *)dev_id;
 345         struct hisi_femac_priv *priv = netdev_priv(dev);
 346
 347         ints = readl(priv->glb_base + GLB_IRQ_RAW);
 348
 349         if (likely(ints & DEF_INT_MASK)) {
 350                 writel(ints & DEF_INT_MASK,
 351                        priv->glb_base + GLB_IRQ_RAW);
 352                 hisi_femac_irq_disable(priv, DEF_INT_MASK);
 353                 napi_schedule(&priv->napi);
 354         }
 355
 356         return IRQ_HANDLED;
 357 }
 358
 359 static int hisi_femac_init_queue(struct device *dev,
 360                                  struct hisi_femac_queue *queue,
 361                                  unsigned int num)
 362 {
 363         queue->skb = devm_kcalloc(dev, num, sizeof(struct sk_buff *),
 364                                   GFP_KERNEL);
 365         if (!queue->skb)
 366                 return -ENOMEM;
 367
 368         queue->dma_phys = devm_kcalloc(dev, num, sizeof(dma_addr_t),
 369                                        GFP_KERNEL);
 370         if (!queue->dma_phys)
 371                 return -ENOMEM;
 372
 373         queue->num = num;
 374         queue->head = 0;
 375         queue->tail = 0;
 376
 377         return 0;
 378 }
 379
 380 static int hisi_femac_init_tx_and_rx_queues(struct hisi_femac_priv *priv)
 381 {
 382         int ret;
 383
 384         ret = hisi_femac_init_queue(priv->dev, &priv->txq, TXQ_NUM);
 385         if (ret)
 386                 return ret;
 387
 388         ret = hisi_femac_init_queue(priv->dev, &priv->rxq, RXQ_NUM);
 389         if (ret)
 390                 return ret;
 391
 392         priv->tx_fifo_used_cnt = 0;
 393
 394         return 0;
 395 }
 396
 397 static void hisi_femac_free_skb_rings(struct hisi_femac_priv *priv)
 398 {
 399         struct hisi_femac_queue *txq = &priv->txq;
 400         struct hisi_femac_queue *rxq = &priv->rxq;
 401         struct sk_buff *skb;
 402         dma_addr_t dma_addr;
 403         u32 pos;
 404
 405         pos = rxq->tail;
 406         while (pos != rxq->head) {
 407                 skb = rxq->skb[pos];
 408                 if (unlikely(!skb)) {
 409                         netdev_err(priv->ndev, "NULL rx skb. pos=%d, head=%d\n",
 410                                    pos, rxq->head);
 411                         continue;
 412                 }
 413
 414                 dma_addr = rxq->dma_phys[pos];
 415                 dma_unmap_single(priv->dev, dma_addr, MAX_FRAME_SIZE,
 416                                  DMA_FROM_DEVICE);
 417
 418                 dev_kfree_skb_any(skb);
 419                 rxq->skb[pos] = NULL;
 420                 pos = (pos + 1) % rxq->num;
 421         }
 422         rxq->tail = pos;
 423
 424         pos = txq->tail;
 425         while (pos != txq->head) {
 426                 skb = txq->skb[pos];
 427                 if (unlikely(!skb)) {
 428                         netdev_err(priv->ndev, "NULL tx skb. pos=%d, head=%d\n",
 429                                    pos, txq->head);
 430                         continue;
 431                 }
 432                 hisi_femac_tx_dma_unmap(priv, skb, pos);
 433                 dev_kfree_skb_any(skb);
 434                 txq->skb[pos] = NULL;
 435                 pos = (pos + 1) % txq->num;
 436         }
 437         txq->tail = pos;
 438         priv->tx_fifo_used_cnt = 0;
 439 }
 440
 441 static int hisi_femac_set_hw_mac_addr(struct hisi_femac_priv *priv,
 442                                       unsigned char *mac)
 443 {
 444         u32 reg;
 445
 446         reg = mac[1] | (mac[0] << 8);
 447         writel(reg, priv->glb_base + GLB_HOSTMAC_H16);
 448
 449         reg = mac[5] | (mac[4] << 8) | (mac[3] << 16) | (mac[2] << 24);
 450         writel(reg, priv->glb_base + GLB_HOSTMAC_L32);
 451
 452         return 0;
 453 }
 454
 455 static int hisi_femac_port_reset(struct hisi_femac_priv *priv)
 456 {
 457         u32 val;
 458
 459         val = readl(priv->glb_base + GLB_SOFT_RESET);
 460         val |= SOFT_RESET_ALL;
 461         writel(val, priv->glb_base + GLB_SOFT_RESET);
 462
 463         usleep_range(500, 800);
 464
 465         val &= ~SOFT_RESET_ALL;
 466         writel(val, priv->glb_base + GLB_SOFT_RESET);
 467
 468         return 0;
 469 }
 470
 471 static int hisi_femac_net_open(struct net_device *dev)
 472 {
 473         struct hisi_femac_priv *priv = netdev_priv(dev);
 474
 475         hisi_femac_port_reset(priv);
 476         hisi_femac_set_hw_mac_addr(priv, dev->dev_addr);
 477         hisi_femac_rx_refill(priv);
 478
 479         netif_carrier_off(dev);
 480         netdev_reset_queue(dev);
 481         netif_start_queue(dev);
 482         napi_enable(&priv->napi);
 483
 484         priv->link_status = 0;
 485         if (dev->phydev)
 486                 phy_start(dev->phydev);
 487
 488         writel(IRQ_ENA_PORT0_MASK, priv->glb_base + GLB_IRQ_RAW);
 489         hisi_femac_irq_enable(priv, IRQ_ENA_ALL | IRQ_ENA_PORT0 | DEF_INT_MASK);
 490
 491         return 0;
 492 }
 493
 494 static int hisi_femac_net_close(struct net_device *dev)
 495 {
 496         struct hisi_femac_priv *priv = netdev_priv(dev);
 497
 498         hisi_femac_irq_disable(priv, IRQ_ENA_PORT0);
 499
 500         if (dev->phydev)
 501                 phy_stop(dev->phydev);
 502
 503         netif_stop_queue(dev);
 504         napi_disable(&priv->napi);
 505
 506         hisi_femac_free_skb_rings(priv);
 507
 508         return 0;
 509 }
 510
 511 static netdev_tx_t hisi_femac_net_xmit(struct sk_buff *skb,
 512                                        struct net_device *dev)
 513 {
 514         struct hisi_femac_priv *priv = netdev_priv(dev);
 515         struct hisi_femac_queue *txq = &priv->txq;
 516         dma_addr_t addr;
 517         u32 val;
 518
 519         val = readl(priv->port_base + ADDRQ_STAT);
 520         val &= BIT_TX_READY;
 521         if (!val) {
 522                 hisi_femac_irq_enable(priv, IRQ_INT_TX_PER_PACKET);
 523                 dev->stats.tx_dropped++;
 524                 dev->stats.tx_fifo_errors++;
 525                 netif_stop_queue(dev);
 526                 return NETDEV_TX_BUSY;
 527         }
 528
 529         if (unlikely(!CIRC_SPACE(txq->head, txq->tail,
 530                                  txq->num))) {
 531                 hisi_femac_irq_enable(priv, IRQ_INT_TX_PER_PACKET);
 532                 dev->stats.tx_dropped++;
 533                 dev->stats.tx_fifo_errors++;
 534                 netif_stop_queue(dev);
 535                 return NETDEV_TX_BUSY;
 536         }
 537
 538         addr = dma_map_single(priv->dev, skb->data,
 539                               skb->len, DMA_TO_DEVICE);
 540         if (unlikely(dma_mapping_error(priv->dev, addr))) {
 541                 dev_kfree_skb_any(skb);
 542                 dev->stats.tx_dropped++;
 543                 return NETDEV_TX_OK;
 544         }
 545         txq->dma_phys[txq->head] = addr;
 546
 547         txq->skb[txq->head] = skb;
 548         txq->head = (txq->head + 1) % txq->num;
 549
 550         writel(addr, priv->port_base + EQ_ADDR);
 551         writel(skb->len + ETH_FCS_LEN, priv->port_base + EQFRM_LEN);
 552
 553         priv->tx_fifo_used_cnt++;
 554
 555         dev->stats.tx_packets++;
 556         dev->stats.tx_bytes += skb->len;
 557         netdev_sent_queue(dev, skb->len);
 558
 559         return NETDEV_TX_OK;
 560 }
 561
 562 static int hisi_femac_set_mac_address(struct net_device *dev, void *p)
 563 {
 564         struct hisi_femac_priv *priv = netdev_priv(dev);
 565         struct sockaddr *skaddr = p;
 566
 567         if (!is_valid_ether_addr(skaddr->sa_data))
 568                 return -EADDRNOTAVAIL;
 569
 570         memcpy(dev->dev_addr, skaddr->sa_data, dev->addr_len);
 571         dev->addr_assign_type &= ~NET_ADDR_RANDOM;
 572
 573         hisi_femac_set_hw_mac_addr(priv, dev->dev_addr);
 574
 575         return 0;
 576 }
 577
 578 static void hisi_femac_enable_hw_addr_filter(struct hisi_femac_priv *priv,
 579                                              unsigned int reg_n, bool enable)
 580 {
 581         u32 val;
 582
 583         val = readl(priv->glb_base + GLB_MAC_H16(reg_n));
 584         if (enable)
 585                 val |= BIT_MACFLT_ENA;
 586         else
 587                 val &= ~BIT_MACFLT_ENA;
 588         writel(val, priv->glb_base + GLB_MAC_H16(reg_n));
 589 }
 590
 591 static void hisi_femac_set_hw_addr_filter(struct hisi_femac_priv *priv,
 592                                           unsigned char *addr,
 593                                           unsigned int reg_n)
 594 {
 595         unsigned int high, low;
 596         u32 val;
 597
 598         high = GLB_MAC_H16(reg_n);
 599         low = GLB_MAC_L32(reg_n);
 600
 601         val = (addr[2] << 24) | (addr[3] << 16) | (addr[4] << 8) | addr[5];
 602         writel(val, priv->glb_base + low);
 603
 604         val = readl(priv->glb_base + high);
 605         val &= ~MACFLT_HI16_MASK;
 606         val |= ((addr[0] << 8) | addr[1]);
 607         val |= (BIT_MACFLT_ENA | BIT_MACFLT_FW2CPU);
 608         writel(val, priv->glb_base + high);
 609 }
 610
 611 static void hisi_femac_set_promisc_mode(struct hisi_femac_priv *priv,
 612                                         bool promisc_mode)
 613 {
 614         u32 val;
 615
 616         val = readl(priv->glb_base + GLB_FWCTRL);
 617         if (promisc_mode)
 618                 val |= FWCTRL_FWALL2CPU;
 619         else
 620                 val &= ~FWCTRL_FWALL2CPU;
 621         writel(val, priv->glb_base + GLB_FWCTRL);
 622 }
 623
 624 /* Handle multiple multicast addresses (perfect filtering)*/
 625 static void hisi_femac_set_mc_addr_filter(struct hisi_femac_priv *priv)
 626 {
 627         struct net_device *dev = priv->ndev;
 628         u32 val;
 629
 630         val = readl(priv->glb_base + GLB_MACTCTRL);
 631         if ((netdev_mc_count(dev) > MAX_MULTICAST_ADDRESSES) ||
 632             (dev->flags & IFF_ALLMULTI)) {
 633                 val |= MACTCTRL_MULTI2CPU;
 634         } else {
 635                 int reg = MAX_UNICAST_ADDRESSES;
 636                 int i;
 637                 struct netdev_hw_addr *ha;
 638
 639                 for (i = reg; i < MAX_MAC_FILTER_NUM; i++)
 640                         hisi_femac_enable_hw_addr_filter(priv, i, false);
 641
 642                 netdev_for_each_mc_addr(ha, dev) {
 643                         hisi_femac_set_hw_addr_filter(priv, ha->addr, reg);
 644                         reg++;
 645                 }
 646                 val &= ~MACTCTRL_MULTI2CPU;
 647         }
 648         writel(val, priv->glb_base + GLB_MACTCTRL);
 649 }
 650
 651 /* Handle multiple unicast addresses (perfect filtering)*/
 652 static void hisi_femac_set_uc_addr_filter(struct hisi_femac_priv *priv)
 653 {
 654         struct net_device *dev = priv->ndev;
 655         u32 val;
 656
 657         val = readl(priv->glb_base + GLB_MACTCTRL);
 658         if (netdev_uc_count(dev) > MAX_UNICAST_ADDRESSES) {
 659                 val |= MACTCTRL_UNI2CPU;
 660         } else {
 661                 int reg = 0;
 662                 int i;
 663                 struct netdev_hw_addr *ha;
 664
 665                 for (i = reg; i < MAX_UNICAST_ADDRESSES; i++)
 666                         hisi_femac_enable_hw_addr_filter(priv, i, false);
 667
 668                 netdev_for_each_uc_addr(ha, dev) {
 669                         hisi_femac_set_hw_addr_filter(priv, ha->addr, reg);
 670                         reg++;
 671                 }
 672                 val &= ~MACTCTRL_UNI2CPU;
 673         }
 674         writel(val, priv->glb_base + GLB_MACTCTRL);
 675 }
 676
 677 static void hisi_femac_net_set_rx_mode(struct net_device *dev)
 678 {
 679         struct hisi_femac_priv *priv = netdev_priv(dev);
 680
 681         if (dev->flags & IFF_PROMISC) {
 682                 hisi_femac_set_promisc_mode(priv, true);
 683         } else {
 684                 hisi_femac_set_promisc_mode(priv, false);
 685                 hisi_femac_set_mc_addr_filter(priv);
 686                 hisi_femac_set_uc_addr_filter(priv);
 687         }
 688 }
 689
 690 static int hisi_femac_net_ioctl(struct net_device *dev,
 691                                 struct ifreq *ifreq, int cmd)
 692 {
 693         if (!netif_running(dev))
 694                 return -EINVAL;
 695
 696         if (!dev->phydev)
 697                 return -EINVAL;
 698
 699         return phy_mii_ioctl(dev->phydev, ifreq, cmd);
 700 }
 701
 702 static const struct ethtool_ops hisi_femac_ethtools_ops = {
 703         .get_link               = ethtool_op_get_link,
 704         .get_link_ksettings     = phy_ethtool_get_link_ksettings,
 705         .set_link_ksettings     = phy_ethtool_set_link_ksettings,
 706 };
 707
 708 static const struct net_device_ops hisi_femac_netdev_ops = {
 709         .ndo_open               = hisi_femac_net_open,
 710         .ndo_stop               = hisi_femac_net_close,
 711         .ndo_start_xmit         = hisi_femac_net_xmit,
 712         .ndo_do_ioctl           = hisi_femac_net_ioctl,
 713         .ndo_set_mac_address    = hisi_femac_set_mac_address,
 714         .ndo_set_rx_mode        = hisi_femac_net_set_rx_mode,
 715 };
 716
 717 static void hisi_femac_core_reset(struct hisi_femac_priv *priv)
 718 {
 719         reset_control_assert(priv->mac_rst);
 720         reset_control_deassert(priv->mac_rst);
 721 }
 722
 723 static void hisi_femac_sleep_us(u32 time_us)
 724 {
 725         u32 time_ms;
 726
 727         if (!time_us)
 728                 return;
 729
 730         time_ms = DIV_ROUND_UP(time_us, 1000);
 731         if (time_ms < 20)
 732                 usleep_range(time_us, time_us + 500);
 733         else
 734                 msleep(time_ms);
 735 }
 736
 737 static void hisi_femac_phy_reset(struct hisi_femac_priv *priv)
 738 {
 739         /* To make sure PHY hardware reset success,
 740          * we must keep PHY in deassert state first and
 741          * then complete the hardware reset operation
 742          */
 743         reset_control_deassert(priv->phy_rst);
 744         hisi_femac_sleep_us(priv->phy_reset_delays[PRE_DELAY]);
 745
 746         reset_control_assert(priv->phy_rst);
 747         /* delay some time to ensure reset ok,
 748          * this depends on PHY hardware feature
 749          */
 750         hisi_femac_sleep_us(priv->phy_reset_delays[PULSE]);
 751         reset_control_deassert(priv->phy_rst);
 752         /* delay some time to ensure later MDIO access */
 753         hisi_femac_sleep_us(priv->phy_reset_delays[POST_DELAY]);
 754 }
 755
 756 static void hisi_femac_port_init(struct hisi_femac_priv *priv)
 757 {
 758         u32 val;
 759
 760         /* MAC gets link status info and phy mode by software config */
 761         val = MAC_PORTSEL_STAT_CPU;
 762         if (priv->ndev->phydev->interface == PHY_INTERFACE_MODE_RMII)
 763                 val |= MAC_PORTSEL_RMII;
 764         writel(val, priv->port_base + MAC_PORTSEL);
 765
 766         /*clear all interrupt status */
 767         writel(IRQ_ENA_PORT0_MASK, priv->glb_base + GLB_IRQ_RAW);
 768         hisi_femac_irq_disable(priv, IRQ_ENA_PORT0_MASK | IRQ_ENA_PORT0);
 769
 770         val = readl(priv->glb_base + GLB_FWCTRL);
 771         val &= ~(FWCTRL_VLAN_ENABLE | FWCTRL_FWALL2CPU);
 772         val |= FWCTRL_FW2CPU_ENA;
 773         writel(val, priv->glb_base + GLB_FWCTRL);
 774
 775         val = readl(priv->glb_base + GLB_MACTCTRL);
 776         val |= (MACTCTRL_BROAD2CPU | MACTCTRL_MACT_ENA);
 777         writel(val, priv->glb_base + GLB_MACTCTRL);
 778
 779         val = readl(priv->port_base + MAC_SET);
 780         val &= ~MAX_FRAME_SIZE_MASK;
 781         val |= MAX_FRAME_SIZE;
 782         writel(val, priv->port_base + MAC_SET);
 783
 784         val = RX_COALESCED_TIMER |
 785                 (RX_COALESCED_FRAMES << RX_COALESCED_FRAME_OFFSET);
 786         writel(val, priv->port_base + RX_COALESCE_SET);
 787
 788         val = (HW_RX_FIFO_DEPTH << RX_DEPTH_OFFSET) | HW_TX_FIFO_DEPTH;
 789         writel(val, priv->port_base + QLEN_SET);
 790 }
 791
 792 static int hisi_femac_drv_probe(struct platform_device *pdev)
 793 {
 794         struct device *dev = &pdev->dev;
 795         struct device_node *node = dev->of_node;
 796         struct resource *res;
 797         struct net_device *ndev;
 798         struct hisi_femac_priv *priv;
 799         struct phy_device *phy;
 800         const char *mac_addr;
 801         int ret;
 802
 803         ndev = alloc_etherdev(sizeof(*priv));
 804         if (!ndev)
 805                 return -ENOMEM;
 806
 807         platform_set_drvdata(pdev, ndev);
 808         SET_NETDEV_DEV(ndev, &pdev->dev);
 809
 810         priv = netdev_priv(ndev);
 811         priv->dev = dev;
 812         priv->ndev = ndev;
 813
 814         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 815         priv->port_base = devm_ioremap_resource(dev, res);
 816         if (IS_ERR(priv->port_base)) {
 817                 ret = PTR_ERR(priv->port_base);
 818                 goto out_free_netdev;
 819         }
 820
 821         res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
 822         priv->glb_base = devm_ioremap_resource(dev, res);
 823         if (IS_ERR(priv->glb_base)) {
 824                 ret = PTR_ERR(priv->glb_base);
 825                 goto out_free_netdev;
 826         }
 827
 828         priv->clk = devm_clk_get(&pdev->dev, NULL);
 829         if (IS_ERR(priv->clk)) {
 830                 dev_err(dev, "failed to get clk\n");
 831                 ret = -ENODEV;
 832                 goto out_free_netdev;
 833         }
 834
 835         ret = clk_prepare_enable(priv->clk);
 836         if (ret) {
 837                 dev_err(dev, "failed to enable clk %d\n", ret);
 838                 goto out_free_netdev;
 839         }
 840
 841         priv->mac_rst = devm_reset_control_get(dev, "mac");
 842         if (IS_ERR(priv->mac_rst)) {
 843                 ret = PTR_ERR(priv->mac_rst);
 844                 goto out_disable_clk;
 845         }
 846         hisi_femac_core_reset(priv);
 847
 848         priv->phy_rst = devm_reset_control_get(dev, "phy");
 849         if (IS_ERR(priv->phy_rst)) {
 850                 priv->phy_rst = NULL;
 851         } else {
 852                 ret = of_property_read_u32_array(node,
 853                                                  PHY_RESET_DELAYS_PROPERTY,
 854                                                  priv->phy_reset_delays,
 855                                                  DELAYS_NUM);
 856                 if (ret)
 857                         goto out_disable_clk;
 858                 hisi_femac_phy_reset(priv);
 859         }
 860
 861         phy = of_phy_get_and_connect(ndev, node, hisi_femac_adjust_link);
 862         if (!phy) {
 863                 dev_err(dev, "connect to PHY failed!\n");
 864                 ret = -ENODEV;
 865                 goto out_disable_clk;
 866         }
 867
 868         phy_attached_print(phy, "phy_id=0x%.8lx, phy_mode=%s\n",
 869                            (unsigned long)phy->phy_id,
 870                            phy_modes(phy->interface));
 871
 872         mac_addr = of_get_mac_address(node);
 873         if (mac_addr)
 874                 ether_addr_copy(ndev->dev_addr, mac_addr);
 875         if (!is_valid_ether_addr(ndev->dev_addr)) {
 876                 eth_hw_addr_random(ndev);
 877                 dev_warn(dev, "using random MAC address %pM\n",
 878                          ndev->dev_addr);
 879         }
 880
 881         ndev->watchdog_timeo = 6 * HZ;
 882         ndev->priv_flags |= IFF_UNICAST_FLT;
 883         ndev->netdev_ops = &hisi_femac_netdev_ops;
 884         ndev->ethtool_ops = &hisi_femac_ethtools_ops;
 885         netif_napi_add(ndev, &priv->napi, hisi_femac_poll, FEMAC_POLL_WEIGHT);
 886
 887         hisi_femac_port_init(priv);
 888
 889         ret = hisi_femac_init_tx_and_rx_queues(priv);
 890         if (ret)
 891                 goto out_disconnect_phy;
 892
 893         ndev->irq = platform_get_irq(pdev, 0);
 894         if (ndev->irq <= 0) {
 895                 dev_err(dev, "No irq resource\n");
 896                 ret = -ENODEV;
 897                 goto out_disconnect_phy;
 898         }
 899
 900         ret = devm_request_irq(dev, ndev->irq, hisi_femac_interrupt,
 901                                IRQF_SHARED, pdev->name, ndev);
 902         if (ret) {
 903                 dev_err(dev, "devm_request_irq %d failed!\n", ndev->irq);
 904                 goto out_disconnect_phy;
 905         }
 906
 907         ret = register_netdev(ndev);
 908         if (ret) {
 909                 dev_err(dev, "register_netdev failed!\n");
 910                 goto out_disconnect_phy;
 911         }
 912
 913         return ret;
 914
 915 out_disconnect_phy:
 916         netif_napi_del(&priv->napi);
 917         phy_disconnect(phy);
 918 out_disable_clk:
 919         clk_disable_unprepare(priv->clk);
 920 out_free_netdev:
 921         free_netdev(ndev);
 922
 923         return ret;
 924 }
 925
 926 static int hisi_femac_drv_remove(struct platform_device *pdev)
 927 {
 928         struct net_device *ndev = platform_get_drvdata(pdev);
 929         struct hisi_femac_priv *priv = netdev_priv(ndev);
 930
 931         netif_napi_del(&priv->napi);
 932         unregister_netdev(ndev);
 933
 934         phy_disconnect(ndev->phydev);
 935         clk_disable_unprepare(priv->clk);
 936         free_netdev(ndev);
 937
 938         return 0;
 939 }
 940
 941 #ifdef CONFIG_PM
 942 static int hisi_femac_drv_suspend(struct platform_device *pdev,
 943                                   pm_message_t state)
 944 {
 945         struct net_device *ndev = platform_get_drvdata(pdev);
 946         struct hisi_femac_priv *priv = netdev_priv(ndev);
 947
 948         disable_irq(ndev->irq);
 949         if (netif_running(ndev)) {
 950                 hisi_femac_net_close(ndev);
 951                 netif_device_detach(ndev);
 952         }
 953
 954         clk_disable_unprepare(priv->clk);
 955
 956         return 0;
 957 }
 958
 959 static int hisi_femac_drv_resume(struct platform_device *pdev)
 960 {
 961         struct net_device *ndev = platform_get_drvdata(pdev);
 962         struct hisi_femac_priv *priv = netdev_priv(ndev);
 963
 964         clk_prepare_enable(priv->clk);
 965         if (priv->phy_rst)
 966                 hisi_femac_phy_reset(priv);
 967
 968         if (netif_running(ndev)) {
 969                 hisi_femac_port_init(priv);
 970                 hisi_femac_net_open(ndev);
 971                 netif_device_attach(ndev);
 972         }
 973         enable_irq(ndev->irq);
 974
 975         return 0;
 976 }
 977 #endif
 978
 979 static const struct of_device_id hisi_femac_match[] = {
 980         {.compatible = "hisilicon,hisi-femac-v1",},
 981         {.compatible = "hisilicon,hisi-femac-v2",},
 982         {.compatible = "hisilicon,hi3516cv300-femac",},
 983         {},
 984 };
 985
 986 MODULE_DEVICE_TABLE(of, hisi_femac_match);
 987
 988 static struct platform_driver hisi_femac_driver = {
 989         .driver = {
 990                 .name = "hisi-femac",
 991                 .of_match_table = hisi_femac_match,
 992         },
 993         .probe = hisi_femac_drv_probe,
 994         .remove = hisi_femac_drv_remove,
 995 #ifdef CONFIG_PM
 996         .suspend = hisi_femac_drv_suspend,
 997         .resume = hisi_femac_drv_resume,
 998 #endif
 999 };
1000
1001 module_platform_driver(hisi_femac_driver);
1002
1003 MODULE_DESCRIPTION("Hisilicon Fast Ethernet MAC driver");
1004 MODULE_AUTHOR("Dongpo Li <lidongpo@hisilicon.com>");
1005 MODULE_LICENSE("GPL v2");
1006 MODULE_ALIAS("platform:hisi-femac");