linux/drivers/net/ethernet/stmicro/stmmac/dwmac4_dma.c
<<
>>
Prefs
   1// SPDX-License-Identifier: GPL-2.0-only
   2/*
   3 * This is the driver for the GMAC on-chip Ethernet controller for ST SoCs.
   4 * DWC Ether MAC version 4.xx  has been used for  developing this code.
   5 *
   6 * This contains the functions to handle the dma.
   7 *
   8 * Copyright (C) 2015  STMicroelectronics Ltd
   9 *
  10 * Author: Alexandre Torgue <alexandre.torgue@st.com>
  11 */
  12
  13#include <linux/io.h>
  14#include "dwmac4.h"
  15#include "dwmac4_dma.h"
  16
  17static void dwmac4_dma_axi(void __iomem *ioaddr, struct stmmac_axi *axi)
  18{
  19        u32 value = readl(ioaddr + DMA_SYS_BUS_MODE);
  20        int i;
  21
  22        pr_info("dwmac4: Master AXI performs %s burst length\n",
  23                (value & DMA_SYS_BUS_FB) ? "fixed" : "any");
  24
  25        if (axi->axi_lpi_en)
  26                value |= DMA_AXI_EN_LPI;
  27        if (axi->axi_xit_frm)
  28                value |= DMA_AXI_LPI_XIT_FRM;
  29
  30        value &= ~DMA_AXI_WR_OSR_LMT;
  31        value |= (axi->axi_wr_osr_lmt & DMA_AXI_OSR_MAX) <<
  32                 DMA_AXI_WR_OSR_LMT_SHIFT;
  33
  34        value &= ~DMA_AXI_RD_OSR_LMT;
  35        value |= (axi->axi_rd_osr_lmt & DMA_AXI_OSR_MAX) <<
  36                 DMA_AXI_RD_OSR_LMT_SHIFT;
  37
  38        /* Depending on the UNDEF bit the Master AXI will perform any burst
  39         * length according to the BLEN programmed (by default all BLEN are
  40         * set).
  41         */
  42        for (i = 0; i < AXI_BLEN; i++) {
  43                switch (axi->axi_blen[i]) {
  44                case 256:
  45                        value |= DMA_AXI_BLEN256;
  46                        break;
  47                case 128:
  48                        value |= DMA_AXI_BLEN128;
  49                        break;
  50                case 64:
  51                        value |= DMA_AXI_BLEN64;
  52                        break;
  53                case 32:
  54                        value |= DMA_AXI_BLEN32;
  55                        break;
  56                case 16:
  57                        value |= DMA_AXI_BLEN16;
  58                        break;
  59                case 8:
  60                        value |= DMA_AXI_BLEN8;
  61                        break;
  62                case 4:
  63                        value |= DMA_AXI_BLEN4;
  64                        break;
  65                }
  66        }
  67
  68        writel(value, ioaddr + DMA_SYS_BUS_MODE);
  69}
  70
  71static void dwmac4_dma_init_rx_chan(void __iomem *ioaddr,
  72                                    struct stmmac_dma_cfg *dma_cfg,
  73                                    dma_addr_t dma_rx_phy, u32 chan)
  74{
  75        u32 value;
  76        u32 rxpbl = dma_cfg->rxpbl ?: dma_cfg->pbl;
  77
  78        value = readl(ioaddr + DMA_CHAN_RX_CONTROL(chan));
  79        value = value | (rxpbl << DMA_BUS_MODE_RPBL_SHIFT);
  80        writel(value, ioaddr + DMA_CHAN_RX_CONTROL(chan));
  81
  82        if (IS_ENABLED(CONFIG_ARCH_DMA_ADDR_T_64BIT) && likely(dma_cfg->eame))
  83                writel(upper_32_bits(dma_rx_phy),
  84                       ioaddr + DMA_CHAN_RX_BASE_ADDR_HI(chan));
  85
  86        writel(lower_32_bits(dma_rx_phy), ioaddr + DMA_CHAN_RX_BASE_ADDR(chan));
  87}
  88
  89static void dwmac4_dma_init_tx_chan(void __iomem *ioaddr,
  90                                    struct stmmac_dma_cfg *dma_cfg,
  91                                    dma_addr_t dma_tx_phy, u32 chan)
  92{
  93        u32 value;
  94        u32 txpbl = dma_cfg->txpbl ?: dma_cfg->pbl;
  95
  96        value = readl(ioaddr + DMA_CHAN_TX_CONTROL(chan));
  97        value = value | (txpbl << DMA_BUS_MODE_PBL_SHIFT);
  98
  99        /* Enable OSP to get best performance */
 100        value |= DMA_CONTROL_OSP;
 101
 102        writel(value, ioaddr + DMA_CHAN_TX_CONTROL(chan));
 103
 104        if (IS_ENABLED(CONFIG_ARCH_DMA_ADDR_T_64BIT) && likely(dma_cfg->eame))
 105                writel(upper_32_bits(dma_tx_phy),
 106                       ioaddr + DMA_CHAN_TX_BASE_ADDR_HI(chan));
 107
 108        writel(lower_32_bits(dma_tx_phy), ioaddr + DMA_CHAN_TX_BASE_ADDR(chan));
 109}
 110
 111static void dwmac4_dma_init_channel(void __iomem *ioaddr,
 112                                    struct stmmac_dma_cfg *dma_cfg, u32 chan)
 113{
 114        u32 value;
 115
 116        /* common channel control register config */
 117        value = readl(ioaddr + DMA_CHAN_CONTROL(chan));
 118        if (dma_cfg->pblx8)
 119                value = value | DMA_BUS_MODE_PBL;
 120        writel(value, ioaddr + DMA_CHAN_CONTROL(chan));
 121
 122        /* Mask interrupts by writing to CSR7 */
 123        writel(DMA_CHAN_INTR_DEFAULT_MASK,
 124               ioaddr + DMA_CHAN_INTR_ENA(chan));
 125}
 126
 127static void dwmac410_dma_init_channel(void __iomem *ioaddr,
 128                                      struct stmmac_dma_cfg *dma_cfg, u32 chan)
 129{
 130        u32 value;
 131
 132        /* common channel control register config */
 133        value = readl(ioaddr + DMA_CHAN_CONTROL(chan));
 134        if (dma_cfg->pblx8)
 135                value = value | DMA_BUS_MODE_PBL;
 136
 137        writel(value, ioaddr + DMA_CHAN_CONTROL(chan));
 138
 139        /* Mask interrupts by writing to CSR7 */
 140        writel(DMA_CHAN_INTR_DEFAULT_MASK_4_10,
 141               ioaddr + DMA_CHAN_INTR_ENA(chan));
 142}
 143
 144static void dwmac4_dma_init(void __iomem *ioaddr,
 145                            struct stmmac_dma_cfg *dma_cfg, int atds)
 146{
 147        u32 value = readl(ioaddr + DMA_SYS_BUS_MODE);
 148
 149        /* Set the Fixed burst mode */
 150        if (dma_cfg->fixed_burst)
 151                value |= DMA_SYS_BUS_FB;
 152
 153        /* Mixed Burst has no effect when fb is set */
 154        if (dma_cfg->mixed_burst)
 155                value |= DMA_SYS_BUS_MB;
 156
 157        if (dma_cfg->aal)
 158                value |= DMA_SYS_BUS_AAL;
 159
 160        if (dma_cfg->eame)
 161                value |= DMA_SYS_BUS_EAME;
 162
 163        writel(value, ioaddr + DMA_SYS_BUS_MODE);
 164
 165        value = readl(ioaddr + DMA_BUS_MODE);
 166
 167        if (dma_cfg->multi_msi_en) {
 168                value &= ~DMA_BUS_MODE_INTM_MASK;
 169                value |= (DMA_BUS_MODE_INTM_MODE1 << DMA_BUS_MODE_INTM_SHIFT);
 170        }
 171
 172        if (dma_cfg->dche)
 173                value |= DMA_BUS_MODE_DCHE;
 174
 175        writel(value, ioaddr + DMA_BUS_MODE);
 176
 177}
 178
 179static void _dwmac4_dump_dma_regs(void __iomem *ioaddr, u32 channel,
 180                                  u32 *reg_space)
 181{
 182        reg_space[DMA_CHAN_CONTROL(channel) / 4] =
 183                readl(ioaddr + DMA_CHAN_CONTROL(channel));
 184        reg_space[DMA_CHAN_TX_CONTROL(channel) / 4] =
 185                readl(ioaddr + DMA_CHAN_TX_CONTROL(channel));
 186        reg_space[DMA_CHAN_RX_CONTROL(channel) / 4] =
 187                readl(ioaddr + DMA_CHAN_RX_CONTROL(channel));
 188        reg_space[DMA_CHAN_TX_BASE_ADDR(channel) / 4] =
 189                readl(ioaddr + DMA_CHAN_TX_BASE_ADDR(channel));
 190        reg_space[DMA_CHAN_RX_BASE_ADDR(channel) / 4] =
 191                readl(ioaddr + DMA_CHAN_RX_BASE_ADDR(channel));
 192        reg_space[DMA_CHAN_TX_END_ADDR(channel) / 4] =
 193                readl(ioaddr + DMA_CHAN_TX_END_ADDR(channel));
 194        reg_space[DMA_CHAN_RX_END_ADDR(channel) / 4] =
 195                readl(ioaddr + DMA_CHAN_RX_END_ADDR(channel));
 196        reg_space[DMA_CHAN_TX_RING_LEN(channel) / 4] =
 197                readl(ioaddr + DMA_CHAN_TX_RING_LEN(channel));
 198        reg_space[DMA_CHAN_RX_RING_LEN(channel) / 4] =
 199                readl(ioaddr + DMA_CHAN_RX_RING_LEN(channel));
 200        reg_space[DMA_CHAN_INTR_ENA(channel) / 4] =
 201                readl(ioaddr + DMA_CHAN_INTR_ENA(channel));
 202        reg_space[DMA_CHAN_RX_WATCHDOG(channel) / 4] =
 203                readl(ioaddr + DMA_CHAN_RX_WATCHDOG(channel));
 204        reg_space[DMA_CHAN_SLOT_CTRL_STATUS(channel) / 4] =
 205                readl(ioaddr + DMA_CHAN_SLOT_CTRL_STATUS(channel));
 206        reg_space[DMA_CHAN_CUR_TX_DESC(channel) / 4] =
 207                readl(ioaddr + DMA_CHAN_CUR_TX_DESC(channel));
 208        reg_space[DMA_CHAN_CUR_RX_DESC(channel) / 4] =
 209                readl(ioaddr + DMA_CHAN_CUR_RX_DESC(channel));
 210        reg_space[DMA_CHAN_CUR_TX_BUF_ADDR(channel) / 4] =
 211                readl(ioaddr + DMA_CHAN_CUR_TX_BUF_ADDR(channel));
 212        reg_space[DMA_CHAN_CUR_RX_BUF_ADDR(channel) / 4] =
 213                readl(ioaddr + DMA_CHAN_CUR_RX_BUF_ADDR(channel));
 214        reg_space[DMA_CHAN_STATUS(channel) / 4] =
 215                readl(ioaddr + DMA_CHAN_STATUS(channel));
 216}
 217
 218static void dwmac4_dump_dma_regs(void __iomem *ioaddr, u32 *reg_space)
 219{
 220        int i;
 221
 222        for (i = 0; i < DMA_CHANNEL_NB_MAX; i++)
 223                _dwmac4_dump_dma_regs(ioaddr, i, reg_space);
 224}
 225
 226static void dwmac4_rx_watchdog(void __iomem *ioaddr, u32 riwt, u32 queue)
 227{
 228        writel(riwt, ioaddr + DMA_CHAN_RX_WATCHDOG(queue));
 229}
 230
 231static void dwmac4_dma_rx_chan_op_mode(void __iomem *ioaddr, int mode,
 232                                       u32 channel, int fifosz, u8 qmode)
 233{
 234        unsigned int rqs = fifosz / 256 - 1;
 235        u32 mtl_rx_op;
 236
 237        mtl_rx_op = readl(ioaddr + MTL_CHAN_RX_OP_MODE(channel));
 238
 239        if (mode == SF_DMA_MODE) {
 240                pr_debug("GMAC: enable RX store and forward mode\n");
 241                mtl_rx_op |= MTL_OP_MODE_RSF;
 242        } else {
 243                pr_debug("GMAC: disable RX SF mode (threshold %d)\n", mode);
 244                mtl_rx_op &= ~MTL_OP_MODE_RSF;
 245                mtl_rx_op &= MTL_OP_MODE_RTC_MASK;
 246                if (mode <= 32)
 247                        mtl_rx_op |= MTL_OP_MODE_RTC_32;
 248                else if (mode <= 64)
 249                        mtl_rx_op |= MTL_OP_MODE_RTC_64;
 250                else if (mode <= 96)
 251                        mtl_rx_op |= MTL_OP_MODE_RTC_96;
 252                else
 253                        mtl_rx_op |= MTL_OP_MODE_RTC_128;
 254        }
 255
 256        mtl_rx_op &= ~MTL_OP_MODE_RQS_MASK;
 257        mtl_rx_op |= rqs << MTL_OP_MODE_RQS_SHIFT;
 258
 259        /* Enable flow control only if each channel gets 4 KiB or more FIFO and
 260         * only if channel is not an AVB channel.
 261         */
 262        if ((fifosz >= 4096) && (qmode != MTL_QUEUE_AVB)) {
 263                unsigned int rfd, rfa;
 264
 265                mtl_rx_op |= MTL_OP_MODE_EHFC;
 266
 267                /* Set Threshold for Activating Flow Control to min 2 frames,
 268                 * i.e. 1500 * 2 = 3000 bytes.
 269                 *
 270                 * Set Threshold for Deactivating Flow Control to min 1 frame,
 271                 * i.e. 1500 bytes.
 272                 */
 273                switch (fifosz) {
 274                case 4096:
 275                        /* This violates the above formula because of FIFO size
 276                         * limit therefore overflow may occur in spite of this.
 277                         */
 278                        rfd = 0x03; /* Full-2.5K */
 279                        rfa = 0x01; /* Full-1.5K */
 280                        break;
 281
 282                default:
 283                        rfd = 0x07; /* Full-4.5K */
 284                        rfa = 0x04; /* Full-3K */
 285                        break;
 286                }
 287
 288                mtl_rx_op &= ~MTL_OP_MODE_RFD_MASK;
 289                mtl_rx_op |= rfd << MTL_OP_MODE_RFD_SHIFT;
 290
 291                mtl_rx_op &= ~MTL_OP_MODE_RFA_MASK;
 292                mtl_rx_op |= rfa << MTL_OP_MODE_RFA_SHIFT;
 293        }
 294
 295        writel(mtl_rx_op, ioaddr + MTL_CHAN_RX_OP_MODE(channel));
 296}
 297
 298static void dwmac4_dma_tx_chan_op_mode(void __iomem *ioaddr, int mode,
 299                                       u32 channel, int fifosz, u8 qmode)
 300{
 301        u32 mtl_tx_op = readl(ioaddr + MTL_CHAN_TX_OP_MODE(channel));
 302        unsigned int tqs = fifosz / 256 - 1;
 303
 304        if (mode == SF_DMA_MODE) {
 305                pr_debug("GMAC: enable TX store and forward mode\n");
 306                /* Transmit COE type 2 cannot be done in cut-through mode. */
 307                mtl_tx_op |= MTL_OP_MODE_TSF;
 308        } else {
 309                pr_debug("GMAC: disabling TX SF (threshold %d)\n", mode);
 310                mtl_tx_op &= ~MTL_OP_MODE_TSF;
 311                mtl_tx_op &= MTL_OP_MODE_TTC_MASK;
 312                /* Set the transmit threshold */
 313                if (mode <= 32)
 314                        mtl_tx_op |= MTL_OP_MODE_TTC_32;
 315                else if (mode <= 64)
 316                        mtl_tx_op |= MTL_OP_MODE_TTC_64;
 317                else if (mode <= 96)
 318                        mtl_tx_op |= MTL_OP_MODE_TTC_96;
 319                else if (mode <= 128)
 320                        mtl_tx_op |= MTL_OP_MODE_TTC_128;
 321                else if (mode <= 192)
 322                        mtl_tx_op |= MTL_OP_MODE_TTC_192;
 323                else if (mode <= 256)
 324                        mtl_tx_op |= MTL_OP_MODE_TTC_256;
 325                else if (mode <= 384)
 326                        mtl_tx_op |= MTL_OP_MODE_TTC_384;
 327                else
 328                        mtl_tx_op |= MTL_OP_MODE_TTC_512;
 329        }
 330        /* For an IP with DWC_EQOS_NUM_TXQ == 1, the fields TXQEN and TQS are RO
 331         * with reset values: TXQEN on, TQS == DWC_EQOS_TXFIFO_SIZE.
 332         * For an IP with DWC_EQOS_NUM_TXQ > 1, the fields TXQEN and TQS are R/W
 333         * with reset values: TXQEN off, TQS 256 bytes.
 334         *
 335         * TXQEN must be written for multi-channel operation and TQS must
 336         * reflect the available fifo size per queue (total fifo size / number
 337         * of enabled queues).
 338         */
 339        mtl_tx_op &= ~MTL_OP_MODE_TXQEN_MASK;
 340        if (qmode != MTL_QUEUE_AVB)
 341                mtl_tx_op |= MTL_OP_MODE_TXQEN;
 342        else
 343                mtl_tx_op |= MTL_OP_MODE_TXQEN_AV;
 344        mtl_tx_op &= ~MTL_OP_MODE_TQS_MASK;
 345        mtl_tx_op |= tqs << MTL_OP_MODE_TQS_SHIFT;
 346
 347        writel(mtl_tx_op, ioaddr +  MTL_CHAN_TX_OP_MODE(channel));
 348}
 349
 350static int dwmac4_get_hw_feature(void __iomem *ioaddr,
 351                                 struct dma_features *dma_cap)
 352{
 353        u32 hw_cap = readl(ioaddr + GMAC_HW_FEATURE0);
 354
 355        /*  MAC HW feature0 */
 356        dma_cap->mbps_10_100 = (hw_cap & GMAC_HW_FEAT_MIISEL);
 357        dma_cap->mbps_1000 = (hw_cap & GMAC_HW_FEAT_GMIISEL) >> 1;
 358        dma_cap->half_duplex = (hw_cap & GMAC_HW_FEAT_HDSEL) >> 2;
 359        dma_cap->vlhash = (hw_cap & GMAC_HW_FEAT_VLHASH) >> 4;
 360        dma_cap->multi_addr = (hw_cap & GMAC_HW_FEAT_ADDMAC) >> 18;
 361        dma_cap->pcs = (hw_cap & GMAC_HW_FEAT_PCSSEL) >> 3;
 362        dma_cap->sma_mdio = (hw_cap & GMAC_HW_FEAT_SMASEL) >> 5;
 363        dma_cap->pmt_remote_wake_up = (hw_cap & GMAC_HW_FEAT_RWKSEL) >> 6;
 364        dma_cap->pmt_magic_frame = (hw_cap & GMAC_HW_FEAT_MGKSEL) >> 7;
 365        /* MMC */
 366        dma_cap->rmon = (hw_cap & GMAC_HW_FEAT_MMCSEL) >> 8;
 367        /* IEEE 1588-2008 */
 368        dma_cap->atime_stamp = (hw_cap & GMAC_HW_FEAT_TSSEL) >> 12;
 369        /* 802.3az - Energy-Efficient Ethernet (EEE) */
 370        dma_cap->eee = (hw_cap & GMAC_HW_FEAT_EEESEL) >> 13;
 371        /* TX and RX csum */
 372        dma_cap->tx_coe = (hw_cap & GMAC_HW_FEAT_TXCOSEL) >> 14;
 373        dma_cap->rx_coe =  (hw_cap & GMAC_HW_FEAT_RXCOESEL) >> 16;
 374        dma_cap->vlins = (hw_cap & GMAC_HW_FEAT_SAVLANINS) >> 27;
 375        dma_cap->arpoffsel = (hw_cap & GMAC_HW_FEAT_ARPOFFSEL) >> 9;
 376
 377        /* MAC HW feature1 */
 378        hw_cap = readl(ioaddr + GMAC_HW_FEATURE1);
 379        dma_cap->l3l4fnum = (hw_cap & GMAC_HW_FEAT_L3L4FNUM) >> 27;
 380        dma_cap->hash_tb_sz = (hw_cap & GMAC_HW_HASH_TB_SZ) >> 24;
 381        dma_cap->av = (hw_cap & GMAC_HW_FEAT_AVSEL) >> 20;
 382        dma_cap->tsoen = (hw_cap & GMAC_HW_TSOEN) >> 18;
 383        dma_cap->sphen = (hw_cap & GMAC_HW_FEAT_SPHEN) >> 17;
 384
 385        dma_cap->addr64 = (hw_cap & GMAC_HW_ADDR64) >> 14;
 386        switch (dma_cap->addr64) {
 387        case 0:
 388                dma_cap->addr64 = 32;
 389                break;
 390        case 1:
 391                dma_cap->addr64 = 40;
 392                break;
 393        case 2:
 394                dma_cap->addr64 = 48;
 395                break;
 396        default:
 397                dma_cap->addr64 = 32;
 398                break;
 399        }
 400
 401        /* RX and TX FIFO sizes are encoded as log2(n / 128). Undo that by
 402         * shifting and store the sizes in bytes.
 403         */
 404        dma_cap->tx_fifo_size = 128 << ((hw_cap & GMAC_HW_TXFIFOSIZE) >> 6);
 405        dma_cap->rx_fifo_size = 128 << ((hw_cap & GMAC_HW_RXFIFOSIZE) >> 0);
 406        /* MAC HW feature2 */
 407        hw_cap = readl(ioaddr + GMAC_HW_FEATURE2);
 408        /* TX and RX number of channels */
 409        dma_cap->number_rx_channel =
 410                ((hw_cap & GMAC_HW_FEAT_RXCHCNT) >> 12) + 1;
 411        dma_cap->number_tx_channel =
 412                ((hw_cap & GMAC_HW_FEAT_TXCHCNT) >> 18) + 1;
 413        /* TX and RX number of queues */
 414        dma_cap->number_rx_queues =
 415                ((hw_cap & GMAC_HW_FEAT_RXQCNT) >> 0) + 1;
 416        dma_cap->number_tx_queues =
 417                ((hw_cap & GMAC_HW_FEAT_TXQCNT) >> 6) + 1;
 418        /* PPS output */
 419        dma_cap->pps_out_num = (hw_cap & GMAC_HW_FEAT_PPSOUTNUM) >> 24;
 420
 421        /* IEEE 1588-2002 */
 422        dma_cap->time_stamp = 0;
 423        /* Number of Auxiliary Snapshot Inputs */
 424        dma_cap->aux_snapshot_n = (hw_cap & GMAC_HW_FEAT_AUXSNAPNUM) >> 28;
 425
 426        /* MAC HW feature3 */
 427        hw_cap = readl(ioaddr + GMAC_HW_FEATURE3);
 428
 429        /* 5.10 Features */
 430        dma_cap->asp = (hw_cap & GMAC_HW_FEAT_ASP) >> 28;
 431        dma_cap->tbssel = (hw_cap & GMAC_HW_FEAT_TBSSEL) >> 27;
 432        dma_cap->fpesel = (hw_cap & GMAC_HW_FEAT_FPESEL) >> 26;
 433        dma_cap->estwid = (hw_cap & GMAC_HW_FEAT_ESTWID) >> 20;
 434        dma_cap->estdep = (hw_cap & GMAC_HW_FEAT_ESTDEP) >> 17;
 435        dma_cap->estsel = (hw_cap & GMAC_HW_FEAT_ESTSEL) >> 16;
 436        dma_cap->frpes = (hw_cap & GMAC_HW_FEAT_FRPES) >> 13;
 437        dma_cap->frpbs = (hw_cap & GMAC_HW_FEAT_FRPBS) >> 11;
 438        dma_cap->frpsel = (hw_cap & GMAC_HW_FEAT_FRPSEL) >> 10;
 439        dma_cap->dvlan = (hw_cap & GMAC_HW_FEAT_DVLAN) >> 5;
 440
 441        return 0;
 442}
 443
 444/* Enable/disable TSO feature and set MSS */
 445static void dwmac4_enable_tso(void __iomem *ioaddr, bool en, u32 chan)
 446{
 447        u32 value;
 448
 449        if (en) {
 450                /* enable TSO */
 451                value = readl(ioaddr + DMA_CHAN_TX_CONTROL(chan));
 452                writel(value | DMA_CONTROL_TSE,
 453                       ioaddr + DMA_CHAN_TX_CONTROL(chan));
 454        } else {
 455                /* enable TSO */
 456                value = readl(ioaddr + DMA_CHAN_TX_CONTROL(chan));
 457                writel(value & ~DMA_CONTROL_TSE,
 458                       ioaddr + DMA_CHAN_TX_CONTROL(chan));
 459        }
 460}
 461
 462static void dwmac4_qmode(void __iomem *ioaddr, u32 channel, u8 qmode)
 463{
 464        u32 mtl_tx_op = readl(ioaddr + MTL_CHAN_TX_OP_MODE(channel));
 465
 466        mtl_tx_op &= ~MTL_OP_MODE_TXQEN_MASK;
 467        if (qmode != MTL_QUEUE_AVB)
 468                mtl_tx_op |= MTL_OP_MODE_TXQEN;
 469        else
 470                mtl_tx_op |= MTL_OP_MODE_TXQEN_AV;
 471
 472        writel(mtl_tx_op, ioaddr +  MTL_CHAN_TX_OP_MODE(channel));
 473}
 474
 475static void dwmac4_set_bfsize(void __iomem *ioaddr, int bfsize, u32 chan)
 476{
 477        u32 value = readl(ioaddr + DMA_CHAN_RX_CONTROL(chan));
 478
 479        value &= ~DMA_RBSZ_MASK;
 480        value |= (bfsize << DMA_RBSZ_SHIFT) & DMA_RBSZ_MASK;
 481
 482        writel(value, ioaddr + DMA_CHAN_RX_CONTROL(chan));
 483}
 484
 485static void dwmac4_enable_sph(void __iomem *ioaddr, bool en, u32 chan)
 486{
 487        u32 value = readl(ioaddr + GMAC_EXT_CONFIG);
 488
 489        value &= ~GMAC_CONFIG_HDSMS;
 490        value |= GMAC_CONFIG_HDSMS_256; /* Segment max 256 bytes */
 491        writel(value, ioaddr + GMAC_EXT_CONFIG);
 492
 493        value = readl(ioaddr + DMA_CHAN_CONTROL(chan));
 494        if (en)
 495                value |= DMA_CONTROL_SPH;
 496        else
 497                value &= ~DMA_CONTROL_SPH;
 498        writel(value, ioaddr + DMA_CHAN_CONTROL(chan));
 499}
 500
 501static int dwmac4_enable_tbs(void __iomem *ioaddr, bool en, u32 chan)
 502{
 503        u32 value = readl(ioaddr + DMA_CHAN_TX_CONTROL(chan));
 504
 505        if (en)
 506                value |= DMA_CONTROL_EDSE;
 507        else
 508                value &= ~DMA_CONTROL_EDSE;
 509
 510        writel(value, ioaddr + DMA_CHAN_TX_CONTROL(chan));
 511
 512        value = readl(ioaddr + DMA_CHAN_TX_CONTROL(chan)) & DMA_CONTROL_EDSE;
 513        if (en && !value)
 514                return -EIO;
 515
 516        writel(DMA_TBS_DEF_FTOS, ioaddr + DMA_TBS_CTRL);
 517        return 0;
 518}
 519
 520const struct stmmac_dma_ops dwmac4_dma_ops = {
 521        .reset = dwmac4_dma_reset,
 522        .init = dwmac4_dma_init,
 523        .init_chan = dwmac4_dma_init_channel,
 524        .init_rx_chan = dwmac4_dma_init_rx_chan,
 525        .init_tx_chan = dwmac4_dma_init_tx_chan,
 526        .axi = dwmac4_dma_axi,
 527        .dump_regs = dwmac4_dump_dma_regs,
 528        .dma_rx_mode = dwmac4_dma_rx_chan_op_mode,
 529        .dma_tx_mode = dwmac4_dma_tx_chan_op_mode,
 530        .enable_dma_irq = dwmac4_enable_dma_irq,
 531        .disable_dma_irq = dwmac4_disable_dma_irq,
 532        .start_tx = dwmac4_dma_start_tx,
 533        .stop_tx = dwmac4_dma_stop_tx,
 534        .start_rx = dwmac4_dma_start_rx,
 535        .stop_rx = dwmac4_dma_stop_rx,
 536        .dma_interrupt = dwmac4_dma_interrupt,
 537        .get_hw_feature = dwmac4_get_hw_feature,
 538        .rx_watchdog = dwmac4_rx_watchdog,
 539        .set_rx_ring_len = dwmac4_set_rx_ring_len,
 540        .set_tx_ring_len = dwmac4_set_tx_ring_len,
 541        .set_rx_tail_ptr = dwmac4_set_rx_tail_ptr,
 542        .set_tx_tail_ptr = dwmac4_set_tx_tail_ptr,
 543        .enable_tso = dwmac4_enable_tso,
 544        .qmode = dwmac4_qmode,
 545        .set_bfsize = dwmac4_set_bfsize,
 546        .enable_sph = dwmac4_enable_sph,
 547};
 548
 549const struct stmmac_dma_ops dwmac410_dma_ops = {
 550        .reset = dwmac4_dma_reset,
 551        .init = dwmac4_dma_init,
 552        .init_chan = dwmac410_dma_init_channel,
 553        .init_rx_chan = dwmac4_dma_init_rx_chan,
 554        .init_tx_chan = dwmac4_dma_init_tx_chan,
 555        .axi = dwmac4_dma_axi,
 556        .dump_regs = dwmac4_dump_dma_regs,
 557        .dma_rx_mode = dwmac4_dma_rx_chan_op_mode,
 558        .dma_tx_mode = dwmac4_dma_tx_chan_op_mode,
 559        .enable_dma_irq = dwmac410_enable_dma_irq,
 560        .disable_dma_irq = dwmac4_disable_dma_irq,
 561        .start_tx = dwmac4_dma_start_tx,
 562        .stop_tx = dwmac4_dma_stop_tx,
 563        .start_rx = dwmac4_dma_start_rx,
 564        .stop_rx = dwmac4_dma_stop_rx,
 565        .dma_interrupt = dwmac4_dma_interrupt,
 566        .get_hw_feature = dwmac4_get_hw_feature,
 567        .rx_watchdog = dwmac4_rx_watchdog,
 568        .set_rx_ring_len = dwmac4_set_rx_ring_len,
 569        .set_tx_ring_len = dwmac4_set_tx_ring_len,
 570        .set_rx_tail_ptr = dwmac4_set_rx_tail_ptr,
 571        .set_tx_tail_ptr = dwmac4_set_tx_tail_ptr,
 572        .enable_tso = dwmac4_enable_tso,
 573        .qmode = dwmac4_qmode,
 574        .set_bfsize = dwmac4_set_bfsize,
 575        .enable_sph = dwmac4_enable_sph,
 576        .enable_tbs = dwmac4_enable_tbs,
 577};
 578