drivers/net/ethernet/stmicro/stmmac/dwxgmac2_dma.c

   1 // SPDX-License-Identifier: (GPL-2.0 OR MIT)
   2 /*
   3  * Copyright (c) 2018 Synopsys, Inc. and/or its affiliates.
   4  * stmmac XGMAC support.
   5  */
   6
   7 #include <linux/iopoll.h>
   8 #include "stmmac.h"
   9 #include "dwxgmac2.h"
  10
  11 static int dwxgmac2_dma_reset(void __iomem *ioaddr)
  12 {
  13         u32 value = readl(ioaddr + XGMAC_DMA_MODE);
  14
  15         /* DMA SW reset */
  16         writel(value | XGMAC_SWR, ioaddr + XGMAC_DMA_MODE);
  17
  18         return readl_poll_timeout(ioaddr + XGMAC_DMA_MODE, value,
  19                                   !(value & XGMAC_SWR), 0, 100000);
  20 }
  21
  22 static void dwxgmac2_dma_init(void __iomem *ioaddr,
  23                               struct stmmac_dma_cfg *dma_cfg, int atds)
  24 {
  25         u32 value = readl(ioaddr + XGMAC_DMA_SYSBUS_MODE);
  26
  27         if (dma_cfg->aal)
  28                 value |= XGMAC_AAL;
  29
  30         if (dma_cfg->eame)
  31                 value |= XGMAC_EAME;
  32
  33         writel(value, ioaddr + XGMAC_DMA_SYSBUS_MODE);
  34 }
  35
  36 static void dwxgmac2_dma_init_chan(void __iomem *ioaddr,
  37                                    struct stmmac_dma_cfg *dma_cfg, u32 chan)
  38 {
  39         u32 value = readl(ioaddr + XGMAC_DMA_CH_CONTROL(chan));
  40
  41         if (dma_cfg->pblx8)
  42                 value |= XGMAC_PBLx8;
  43
  44         writel(value, ioaddr + XGMAC_DMA_CH_CONTROL(chan));
  45         writel(XGMAC_DMA_INT_DEFAULT_EN, ioaddr + XGMAC_DMA_CH_INT_EN(chan));
  46 }
  47
  48 static void dwxgmac2_dma_init_rx_chan(void __iomem *ioaddr,
  49                                       struct stmmac_dma_cfg *dma_cfg,
  50                                       dma_addr_t phy, u32 chan)
  51 {
  52         u32 rxpbl = dma_cfg->rxpbl ?: dma_cfg->pbl;
  53         u32 value;
  54
  55         value = readl(ioaddr + XGMAC_DMA_CH_RX_CONTROL(chan));
  56         value &= ~XGMAC_RxPBL;
  57         value |= (rxpbl << XGMAC_RxPBL_SHIFT) & XGMAC_RxPBL;
  58         writel(value, ioaddr + XGMAC_DMA_CH_RX_CONTROL(chan));
  59
  60         writel(upper_32_bits(phy), ioaddr + XGMAC_DMA_CH_RxDESC_HADDR(chan));
  61         writel(lower_32_bits(phy), ioaddr + XGMAC_DMA_CH_RxDESC_LADDR(chan));
  62 }
  63
  64 static void dwxgmac2_dma_init_tx_chan(void __iomem *ioaddr,
  65                                       struct stmmac_dma_cfg *dma_cfg,
  66                                       dma_addr_t phy, u32 chan)
  67 {
  68         u32 txpbl = dma_cfg->txpbl ?: dma_cfg->pbl;
  69         u32 value;
  70
  71         value = readl(ioaddr + XGMAC_DMA_CH_TX_CONTROL(chan));
  72         value &= ~XGMAC_TxPBL;
  73         value |= (txpbl << XGMAC_TxPBL_SHIFT) & XGMAC_TxPBL;
  74         value |= XGMAC_OSP;
  75         writel(value, ioaddr + XGMAC_DMA_CH_TX_CONTROL(chan));
  76
  77         writel(upper_32_bits(phy), ioaddr + XGMAC_DMA_CH_TxDESC_HADDR(chan));
  78         writel(lower_32_bits(phy), ioaddr + XGMAC_DMA_CH_TxDESC_LADDR(chan));
  79 }
  80
  81 static void dwxgmac2_dma_axi(void __iomem *ioaddr, struct stmmac_axi *axi)
  82 {
  83         u32 value = readl(ioaddr + XGMAC_DMA_SYSBUS_MODE);
  84         int i;
  85
  86         if (axi->axi_lpi_en)
  87                 value |= XGMAC_EN_LPI;
  88         if (axi->axi_xit_frm)
  89                 value |= XGMAC_LPI_XIT_PKT;
  90
  91         value &= ~XGMAC_WR_OSR_LMT;
  92         value |= (axi->axi_wr_osr_lmt << XGMAC_WR_OSR_LMT_SHIFT) &
  93                 XGMAC_WR_OSR_LMT;
  94
  95         value &= ~XGMAC_RD_OSR_LMT;
  96         value |= (axi->axi_rd_osr_lmt << XGMAC_RD_OSR_LMT_SHIFT) &
  97                 XGMAC_RD_OSR_LMT;
  98
  99         if (!axi->axi_fb)
 100                 value |= XGMAC_UNDEF;
 101
 102         value &= ~XGMAC_BLEN;
 103         for (i = 0; i < AXI_BLEN; i++) {
 104                 switch (axi->axi_blen[i]) {
 105                 case 256:
 106                         value |= XGMAC_BLEN256;
 107                         break;
 108                 case 128:
 109                         value |= XGMAC_BLEN128;
 110                         break;
 111                 case 64:
 112                         value |= XGMAC_BLEN64;
 113                         break;
 114                 case 32:
 115                         value |= XGMAC_BLEN32;
 116                         break;
 117                 case 16:
 118                         value |= XGMAC_BLEN16;
 119                         break;
 120                 case 8:
 121                         value |= XGMAC_BLEN8;
 122                         break;
 123                 case 4:
 124                         value |= XGMAC_BLEN4;
 125                         break;
 126                 }
 127         }
 128
 129         writel(value, ioaddr + XGMAC_DMA_SYSBUS_MODE);
 130         writel(XGMAC_TDPS, ioaddr + XGMAC_TX_EDMA_CTRL);
 131         writel(XGMAC_RDPS, ioaddr + XGMAC_RX_EDMA_CTRL);
 132 }
 133
 134 static void dwxgmac2_dma_dump_regs(void __iomem *ioaddr, u32 *reg_space)
 135 {
 136         int i;
 137
 138         for (i = (XGMAC_DMA_MODE / 4); i < XGMAC_REGSIZE; i++)
 139                 reg_space[i] = readl(ioaddr + i * 4);
 140 }
 141
 142 static void dwxgmac2_dma_rx_mode(void __iomem *ioaddr, int mode,
 143                                  u32 channel, int fifosz, u8 qmode)
 144 {
 145         u32 value = readl(ioaddr + XGMAC_MTL_RXQ_OPMODE(channel));
 146         unsigned int rqs = fifosz / 256 - 1;
 147
 148         if (mode == SF_DMA_MODE) {
 149                 value |= XGMAC_RSF;
 150         } else {
 151                 value &= ~XGMAC_RSF;
 152                 value &= ~XGMAC_RTC;
 153
 154                 if (mode <= 64)
 155                         value |= 0x0 << XGMAC_RTC_SHIFT;
 156                 else if (mode <= 96)
 157                         value |= 0x2 << XGMAC_RTC_SHIFT;
 158                 else
 159                         value |= 0x3 << XGMAC_RTC_SHIFT;
 160         }
 161
 162         value &= ~XGMAC_RQS;
 163         value |= (rqs << XGMAC_RQS_SHIFT) & XGMAC_RQS;
 164
 165         if ((fifosz >= 4096) && (qmode != MTL_QUEUE_AVB)) {
 166                 u32 flow = readl(ioaddr + XGMAC_MTL_RXQ_FLOW_CONTROL(channel));
 167                 unsigned int rfd, rfa;
 168
 169                 value |= XGMAC_EHFC;
 170
 171                 /* Set Threshold for Activating Flow Control to min 2 frames,
 172                  * i.e. 1500 * 2 = 3000 bytes.
 173                  *
 174                  * Set Threshold for Deactivating Flow Control to min 1 frame,
 175                  * i.e. 1500 bytes.
 176                  */
 177                 switch (fifosz) {
 178                 case 4096:
 179                         /* This violates the above formula because of FIFO size
 180                          * limit therefore overflow may occur in spite of this.
 181                          */
 182                         rfd = 0x03; /* Full-2.5K */
 183                         rfa = 0x01; /* Full-1.5K */
 184                         break;
 185
 186                 default:
 187                         rfd = 0x07; /* Full-4.5K */
 188                         rfa = 0x04; /* Full-3K */
 189                         break;
 190                 }
 191
 192                 flow &= ~XGMAC_RFD;
 193                 flow |= rfd << XGMAC_RFD_SHIFT;
 194
 195                 flow &= ~XGMAC_RFA;
 196                 flow |= rfa << XGMAC_RFA_SHIFT;
 197
 198                 writel(flow, ioaddr + XGMAC_MTL_RXQ_FLOW_CONTROL(channel));
 199         }
 200
 201         writel(value, ioaddr + XGMAC_MTL_RXQ_OPMODE(channel));
 202
 203         /* Enable MTL RX overflow */
 204         value = readl(ioaddr + XGMAC_MTL_QINTEN(channel));
 205         writel(value | XGMAC_RXOIE, ioaddr + XGMAC_MTL_QINTEN(channel));
 206 }
 207
 208 static void dwxgmac2_dma_tx_mode(void __iomem *ioaddr, int mode,
 209                                  u32 channel, int fifosz, u8 qmode)
 210 {
 211         u32 value = readl(ioaddr + XGMAC_MTL_TXQ_OPMODE(channel));
 212         unsigned int tqs = fifosz / 256 - 1;
 213
 214         if (mode == SF_DMA_MODE) {
 215                 value |= XGMAC_TSF;
 216         } else {
 217                 value &= ~XGMAC_TSF;
 218                 value &= ~XGMAC_TTC;
 219
 220                 if (mode <= 64)
 221                         value |= 0x0 << XGMAC_TTC_SHIFT;
 222                 else if (mode <= 96)
 223                         value |= 0x2 << XGMAC_TTC_SHIFT;
 224                 else if (mode <= 128)
 225                         value |= 0x3 << XGMAC_TTC_SHIFT;
 226                 else if (mode <= 192)
 227                         value |= 0x4 << XGMAC_TTC_SHIFT;
 228                 else if (mode <= 256)
 229                         value |= 0x5 << XGMAC_TTC_SHIFT;
 230                 else if (mode <= 384)
 231                         value |= 0x6 << XGMAC_TTC_SHIFT;
 232                 else
 233                         value |= 0x7 << XGMAC_TTC_SHIFT;
 234         }
 235
 236         /* Use static TC to Queue mapping */
 237         value |= (channel << XGMAC_Q2TCMAP_SHIFT) & XGMAC_Q2TCMAP;
 238
 239         value &= ~XGMAC_TXQEN;
 240         if (qmode != MTL_QUEUE_AVB)
 241                 value |= 0x2 << XGMAC_TXQEN_SHIFT;
 242         else
 243                 value |= 0x1 << XGMAC_TXQEN_SHIFT;
 244
 245         value &= ~XGMAC_TQS;
 246         value |= (tqs << XGMAC_TQS_SHIFT) & XGMAC_TQS;
 247
 248         writel(value, ioaddr +  XGMAC_MTL_TXQ_OPMODE(channel));
 249 }
 250
 251 static void dwxgmac2_enable_dma_irq(void __iomem *ioaddr, u32 chan,
 252                                     bool rx, bool tx)
 253 {
 254         u32 value = readl(ioaddr + XGMAC_DMA_CH_INT_EN(chan));
 255
 256         if (rx)
 257                 value |= XGMAC_DMA_INT_DEFAULT_RX;
 258         if (tx)
 259                 value |= XGMAC_DMA_INT_DEFAULT_TX;
 260
 261         writel(value, ioaddr + XGMAC_DMA_CH_INT_EN(chan));
 262 }
 263
 264 static void dwxgmac2_disable_dma_irq(void __iomem *ioaddr, u32 chan,
 265                                      bool rx, bool tx)
 266 {
 267         u32 value = readl(ioaddr + XGMAC_DMA_CH_INT_EN(chan));
 268
 269         if (rx)
 270                 value &= ~XGMAC_DMA_INT_DEFAULT_RX;
 271         if (tx)
 272                 value &= ~XGMAC_DMA_INT_DEFAULT_TX;
 273
 274         writel(value, ioaddr + XGMAC_DMA_CH_INT_EN(chan));
 275 }
 276
 277 static void dwxgmac2_dma_start_tx(void __iomem *ioaddr, u32 chan)
 278 {
 279         u32 value;
 280
 281         value = readl(ioaddr + XGMAC_DMA_CH_TX_CONTROL(chan));
 282         value |= XGMAC_TXST;
 283         writel(value, ioaddr + XGMAC_DMA_CH_TX_CONTROL(chan));
 284
 285         value = readl(ioaddr + XGMAC_TX_CONFIG);
 286         value |= XGMAC_CONFIG_TE;
 287         writel(value, ioaddr + XGMAC_TX_CONFIG);
 288 }
 289
 290 static void dwxgmac2_dma_stop_tx(void __iomem *ioaddr, u32 chan)
 291 {
 292         u32 value;
 293
 294         value = readl(ioaddr + XGMAC_DMA_CH_TX_CONTROL(chan));
 295         value &= ~XGMAC_TXST;
 296         writel(value, ioaddr + XGMAC_DMA_CH_TX_CONTROL(chan));
 297
 298         value = readl(ioaddr + XGMAC_TX_CONFIG);
 299         value &= ~XGMAC_CONFIG_TE;
 300         writel(value, ioaddr + XGMAC_TX_CONFIG);
 301 }
 302
 303 static void dwxgmac2_dma_start_rx(void __iomem *ioaddr, u32 chan)
 304 {
 305         u32 value;
 306
 307         value = readl(ioaddr + XGMAC_DMA_CH_RX_CONTROL(chan));
 308         value |= XGMAC_RXST;
 309         writel(value, ioaddr + XGMAC_DMA_CH_RX_CONTROL(chan));
 310
 311         value = readl(ioaddr + XGMAC_RX_CONFIG);
 312         value |= XGMAC_CONFIG_RE;
 313         writel(value, ioaddr + XGMAC_RX_CONFIG);
 314 }
 315
 316 static void dwxgmac2_dma_stop_rx(void __iomem *ioaddr, u32 chan)
 317 {
 318         u32 value;
 319
 320         value = readl(ioaddr + XGMAC_DMA_CH_RX_CONTROL(chan));
 321         value &= ~XGMAC_RXST;
 322         writel(value, ioaddr + XGMAC_DMA_CH_RX_CONTROL(chan));
 323 }
 324
 325 static int dwxgmac2_dma_interrupt(void __iomem *ioaddr,
 326                                   struct stmmac_extra_stats *x, u32 chan,
 327                                   u32 dir)
 328 {
 329         u32 intr_status = readl(ioaddr + XGMAC_DMA_CH_STATUS(chan));
 330         u32 intr_en = readl(ioaddr + XGMAC_DMA_CH_INT_EN(chan));
 331         int ret = 0;
 332
 333         if (dir == DMA_DIR_RX)
 334                 intr_status &= XGMAC_DMA_STATUS_MSK_RX;
 335         else if (dir == DMA_DIR_TX)
 336                 intr_status &= XGMAC_DMA_STATUS_MSK_TX;
 337
 338         /* ABNORMAL interrupts */
 339         if (unlikely(intr_status & XGMAC_AIS)) {
 340                 if (unlikely(intr_status & XGMAC_RBU)) {
 341                         x->rx_buf_unav_irq++;
 342                         ret |= handle_rx;
 343                 }
 344                 if (unlikely(intr_status & XGMAC_TPS)) {
 345                         x->tx_process_stopped_irq++;
 346                         ret |= tx_hard_error;
 347                 }
 348                 if (unlikely(intr_status & XGMAC_FBE)) {
 349                         x->fatal_bus_error_irq++;
 350                         ret |= tx_hard_error;
 351                 }
 352         }
 353
 354         /* TX/RX NORMAL interrupts */
 355         if (likely(intr_status & XGMAC_NIS)) {
 356                 x->normal_irq_n++;
 357
 358                 if (likely(intr_status & XGMAC_RI)) {
 359                         x->rx_normal_irq_n++;
 360                         ret |= handle_rx;
 361                 }
 362                 if (likely(intr_status & (XGMAC_TI | XGMAC_TBU))) {
 363                         x->tx_normal_irq_n++;
 364                         ret |= handle_tx;
 365                 }
 366         }
 367
 368         /* Clear interrupts */
 369         writel(intr_en & intr_status, ioaddr + XGMAC_DMA_CH_STATUS(chan));
 370
 371         return ret;
 372 }
 373
 374 static void dwxgmac2_get_hw_feature(void __iomem *ioaddr,
 375                                     struct dma_features *dma_cap)
 376 {
 377         u32 hw_cap;
 378
 379         /*  MAC HW feature 0 */
 380         hw_cap = readl(ioaddr + XGMAC_HW_FEATURE0);
 381         dma_cap->vlins = (hw_cap & XGMAC_HWFEAT_SAVLANINS) >> 27;
 382         dma_cap->rx_coe = (hw_cap & XGMAC_HWFEAT_RXCOESEL) >> 16;
 383         dma_cap->tx_coe = (hw_cap & XGMAC_HWFEAT_TXCOESEL) >> 14;
 384         dma_cap->eee = (hw_cap & XGMAC_HWFEAT_EEESEL) >> 13;
 385         dma_cap->atime_stamp = (hw_cap & XGMAC_HWFEAT_TSSEL) >> 12;
 386         dma_cap->av = (hw_cap & XGMAC_HWFEAT_AVSEL) >> 11;
 387         dma_cap->av &= !((hw_cap & XGMAC_HWFEAT_RAVSEL) >> 10);
 388         dma_cap->arpoffsel = (hw_cap & XGMAC_HWFEAT_ARPOFFSEL) >> 9;
 389         dma_cap->rmon = (hw_cap & XGMAC_HWFEAT_MMCSEL) >> 8;
 390         dma_cap->pmt_magic_frame = (hw_cap & XGMAC_HWFEAT_MGKSEL) >> 7;
 391         dma_cap->pmt_remote_wake_up = (hw_cap & XGMAC_HWFEAT_RWKSEL) >> 6;
 392         dma_cap->vlhash = (hw_cap & XGMAC_HWFEAT_VLHASH) >> 4;
 393         dma_cap->mbps_1000 = (hw_cap & XGMAC_HWFEAT_GMIISEL) >> 1;
 394
 395         /* MAC HW feature 1 */
 396         hw_cap = readl(ioaddr + XGMAC_HW_FEATURE1);
 397         dma_cap->l3l4fnum = (hw_cap & XGMAC_HWFEAT_L3L4FNUM) >> 27;
 398         dma_cap->hash_tb_sz = (hw_cap & XGMAC_HWFEAT_HASHTBLSZ) >> 24;
 399         dma_cap->rssen = (hw_cap & XGMAC_HWFEAT_RSSEN) >> 20;
 400         dma_cap->tsoen = (hw_cap & XGMAC_HWFEAT_TSOEN) >> 18;
 401         dma_cap->sphen = (hw_cap & XGMAC_HWFEAT_SPHEN) >> 17;
 402
 403         dma_cap->addr64 = (hw_cap & XGMAC_HWFEAT_ADDR64) >> 14;
 404         switch (dma_cap->addr64) {
 405         case 0:
 406                 dma_cap->addr64 = 32;
 407                 break;
 408         case 1:
 409                 dma_cap->addr64 = 40;
 410                 break;
 411         case 2:
 412                 dma_cap->addr64 = 48;
 413                 break;
 414         default:
 415                 dma_cap->addr64 = 32;
 416                 break;
 417         }
 418
 419         dma_cap->tx_fifo_size =
 420                 128 << ((hw_cap & XGMAC_HWFEAT_TXFIFOSIZE) >> 6);
 421         dma_cap->rx_fifo_size =
 422                 128 << ((hw_cap & XGMAC_HWFEAT_RXFIFOSIZE) >> 0);
 423
 424         /* MAC HW feature 2 */
 425         hw_cap = readl(ioaddr + XGMAC_HW_FEATURE2);
 426         dma_cap->pps_out_num = (hw_cap & XGMAC_HWFEAT_PPSOUTNUM) >> 24;
 427         dma_cap->number_tx_channel =
 428                 ((hw_cap & XGMAC_HWFEAT_TXCHCNT) >> 18) + 1;
 429         dma_cap->number_rx_channel =
 430                 ((hw_cap & XGMAC_HWFEAT_RXCHCNT) >> 12) + 1;
 431         dma_cap->number_tx_queues =
 432                 ((hw_cap & XGMAC_HWFEAT_TXQCNT) >> 6) + 1;
 433         dma_cap->number_rx_queues =
 434                 ((hw_cap & XGMAC_HWFEAT_RXQCNT) >> 0) + 1;
 435
 436         /* MAC HW feature 3 */
 437         hw_cap = readl(ioaddr + XGMAC_HW_FEATURE3);
 438         dma_cap->tbssel = (hw_cap & XGMAC_HWFEAT_TBSSEL) >> 27;
 439         dma_cap->fpesel = (hw_cap & XGMAC_HWFEAT_FPESEL) >> 26;
 440         dma_cap->estwid = (hw_cap & XGMAC_HWFEAT_ESTWID) >> 23;
 441         dma_cap->estdep = (hw_cap & XGMAC_HWFEAT_ESTDEP) >> 20;
 442         dma_cap->estsel = (hw_cap & XGMAC_HWFEAT_ESTSEL) >> 19;
 443         dma_cap->asp = (hw_cap & XGMAC_HWFEAT_ASP) >> 14;
 444         dma_cap->dvlan = (hw_cap & XGMAC_HWFEAT_DVLAN) >> 13;
 445         dma_cap->frpes = (hw_cap & XGMAC_HWFEAT_FRPES) >> 11;
 446         dma_cap->frpbs = (hw_cap & XGMAC_HWFEAT_FRPPB) >> 9;
 447         dma_cap->frpsel = (hw_cap & XGMAC_HWFEAT_FRPSEL) >> 3;
 448 }
 449
 450 static void dwxgmac2_rx_watchdog(void __iomem *ioaddr, u32 riwt, u32 queue)
 451 {
 452         writel(riwt & XGMAC_RWT, ioaddr + XGMAC_DMA_CH_Rx_WATCHDOG(queue));
 453 }
 454
 455 static void dwxgmac2_set_rx_ring_len(void __iomem *ioaddr, u32 len, u32 chan)
 456 {
 457         writel(len, ioaddr + XGMAC_DMA_CH_RxDESC_RING_LEN(chan));
 458 }
 459
 460 static void dwxgmac2_set_tx_ring_len(void __iomem *ioaddr, u32 len, u32 chan)
 461 {
 462         writel(len, ioaddr + XGMAC_DMA_CH_TxDESC_RING_LEN(chan));
 463 }
 464
 465 static void dwxgmac2_set_rx_tail_ptr(void __iomem *ioaddr, u32 ptr, u32 chan)
 466 {
 467         writel(ptr, ioaddr + XGMAC_DMA_CH_RxDESC_TAIL_LPTR(chan));
 468 }
 469
 470 static void dwxgmac2_set_tx_tail_ptr(void __iomem *ioaddr, u32 ptr, u32 chan)
 471 {
 472         writel(ptr, ioaddr + XGMAC_DMA_CH_TxDESC_TAIL_LPTR(chan));
 473 }
 474
 475 static void dwxgmac2_enable_tso(void __iomem *ioaddr, bool en, u32 chan)
 476 {
 477         u32 value = readl(ioaddr + XGMAC_DMA_CH_TX_CONTROL(chan));
 478
 479         if (en)
 480                 value |= XGMAC_TSE;
 481         else
 482                 value &= ~XGMAC_TSE;
 483
 484         writel(value, ioaddr + XGMAC_DMA_CH_TX_CONTROL(chan));
 485 }
 486
 487 static void dwxgmac2_qmode(void __iomem *ioaddr, u32 channel, u8 qmode)
 488 {
 489         u32 value = readl(ioaddr + XGMAC_MTL_TXQ_OPMODE(channel));
 490         u32 flow = readl(ioaddr + XGMAC_RX_FLOW_CTRL);
 491
 492         value &= ~XGMAC_TXQEN;
 493         if (qmode != MTL_QUEUE_AVB) {
 494                 value |= 0x2 << XGMAC_TXQEN_SHIFT;
 495                 writel(0, ioaddr + XGMAC_MTL_TCx_ETS_CONTROL(channel));
 496         } else {
 497                 value |= 0x1 << XGMAC_TXQEN_SHIFT;
 498                 writel(flow & (~XGMAC_RFE), ioaddr + XGMAC_RX_FLOW_CTRL);
 499         }
 500
 501         writel(value, ioaddr +  XGMAC_MTL_TXQ_OPMODE(channel));
 502 }
 503
 504 static void dwxgmac2_set_bfsize(void __iomem *ioaddr, int bfsize, u32 chan)
 505 {
 506         u32 value;
 507
 508         value = readl(ioaddr + XGMAC_DMA_CH_RX_CONTROL(chan));
 509         value &= ~XGMAC_RBSZ;
 510         value |= bfsize << XGMAC_RBSZ_SHIFT;
 511         writel(value, ioaddr + XGMAC_DMA_CH_RX_CONTROL(chan));
 512 }
 513
 514 static void dwxgmac2_enable_sph(void __iomem *ioaddr, bool en, u32 chan)
 515 {
 516         u32 value = readl(ioaddr + XGMAC_RX_CONFIG);
 517
 518         value &= ~XGMAC_CONFIG_HDSMS;
 519         value |= XGMAC_CONFIG_HDSMS_256; /* Segment max 256 bytes */
 520         writel(value, ioaddr + XGMAC_RX_CONFIG);
 521
 522         value = readl(ioaddr + XGMAC_DMA_CH_CONTROL(chan));
 523         if (en)
 524                 value |= XGMAC_SPH;
 525         else
 526                 value &= ~XGMAC_SPH;
 527         writel(value, ioaddr + XGMAC_DMA_CH_CONTROL(chan));
 528 }
 529
 530 static int dwxgmac2_enable_tbs(void __iomem *ioaddr, bool en, u32 chan)
 531 {
 532         u32 value = readl(ioaddr + XGMAC_DMA_CH_TX_CONTROL(chan));
 533
 534         if (en)
 535                 value |= XGMAC_EDSE;
 536         else
 537                 value &= ~XGMAC_EDSE;
 538
 539         writel(value, ioaddr + XGMAC_DMA_CH_TX_CONTROL(chan));
 540
 541         value = readl(ioaddr + XGMAC_DMA_CH_TX_CONTROL(chan)) & XGMAC_EDSE;
 542         if (en && !value)
 543                 return -EIO;
 544
 545         writel(XGMAC_DEF_FTOS, ioaddr + XGMAC_DMA_TBS_CTRL0);
 546         writel(XGMAC_DEF_FTOS, ioaddr + XGMAC_DMA_TBS_CTRL1);
 547         writel(XGMAC_DEF_FTOS, ioaddr + XGMAC_DMA_TBS_CTRL2);
 548         writel(XGMAC_DEF_FTOS, ioaddr + XGMAC_DMA_TBS_CTRL3);
 549         return 0;
 550 }
 551
 552 const struct stmmac_dma_ops dwxgmac210_dma_ops = {
 553         .reset = dwxgmac2_dma_reset,
 554         .init = dwxgmac2_dma_init,
 555         .init_chan = dwxgmac2_dma_init_chan,
 556         .init_rx_chan = dwxgmac2_dma_init_rx_chan,
 557         .init_tx_chan = dwxgmac2_dma_init_tx_chan,
 558         .axi = dwxgmac2_dma_axi,
 559         .dump_regs = dwxgmac2_dma_dump_regs,
 560         .dma_rx_mode = dwxgmac2_dma_rx_mode,
 561         .dma_tx_mode = dwxgmac2_dma_tx_mode,
 562         .enable_dma_irq = dwxgmac2_enable_dma_irq,
 563         .disable_dma_irq = dwxgmac2_disable_dma_irq,
 564         .start_tx = dwxgmac2_dma_start_tx,
 565         .stop_tx = dwxgmac2_dma_stop_tx,
 566         .start_rx = dwxgmac2_dma_start_rx,
 567         .stop_rx = dwxgmac2_dma_stop_rx,
 568         .dma_interrupt = dwxgmac2_dma_interrupt,
 569         .get_hw_feature = dwxgmac2_get_hw_feature,
 570         .rx_watchdog = dwxgmac2_rx_watchdog,
 571         .set_rx_ring_len = dwxgmac2_set_rx_ring_len,
 572         .set_tx_ring_len = dwxgmac2_set_tx_ring_len,
 573         .set_rx_tail_ptr = dwxgmac2_set_rx_tail_ptr,
 574         .set_tx_tail_ptr = dwxgmac2_set_tx_tail_ptr,
 575         .enable_tso = dwxgmac2_enable_tso,
 576         .qmode = dwxgmac2_qmode,
 577         .set_bfsize = dwxgmac2_set_bfsize,
 578         .enable_sph = dwxgmac2_enable_sph,
 579         .enable_tbs = dwxgmac2_enable_tbs,
 580 };