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 17 static 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 71 static 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 89 static 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 } 110 111 static 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 } 126 127 static 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 } 143 144 static 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 if (dma_cfg->multi_msi_en) { 166 value = readl(ioaddr + DMA_BUS_MODE); 167 value &= ~DMA_BUS_MODE_INTM_MASK; 168 value |= (DMA_BUS_MODE_INTM_MODE1 << DMA_BUS_MODE_INTM_SHIFT); 169 writel(value, ioaddr + DMA_BUS_MODE); 170 } 171 } 172 173 static void _dwmac4_dump_dma_regs(void __iomem *ioaddr, u32 channel, 174 u32 *reg_space) 175 { 176 reg_space[DMA_CHAN_CONTROL(channel) / 4] = 177 readl(ioaddr + DMA_CHAN_CONTROL(channel)); 178 reg_space[DMA_CHAN_TX_CONTROL(channel) / 4] = 179 readl(ioaddr + DMA_CHAN_TX_CONTROL(channel)); 180 reg_space[DMA_CHAN_RX_CONTROL(channel) / 4] = 181 readl(ioaddr + DMA_CHAN_RX_CONTROL(channel)); 182 reg_space[DMA_CHAN_TX_BASE_ADDR(channel) / 4] = 183 readl(ioaddr + DMA_CHAN_TX_BASE_ADDR(channel)); 184 reg_space[DMA_CHAN_RX_BASE_ADDR(channel) / 4] = 185 readl(ioaddr + DMA_CHAN_RX_BASE_ADDR(channel)); 186 reg_space[DMA_CHAN_TX_END_ADDR(channel) / 4] = 187 readl(ioaddr + DMA_CHAN_TX_END_ADDR(channel)); 188 reg_space[DMA_CHAN_RX_END_ADDR(channel) / 4] = 189 readl(ioaddr + DMA_CHAN_RX_END_ADDR(channel)); 190 reg_space[DMA_CHAN_TX_RING_LEN(channel) / 4] = 191 readl(ioaddr + DMA_CHAN_TX_RING_LEN(channel)); 192 reg_space[DMA_CHAN_RX_RING_LEN(channel) / 4] = 193 readl(ioaddr + DMA_CHAN_RX_RING_LEN(channel)); 194 reg_space[DMA_CHAN_INTR_ENA(channel) / 4] = 195 readl(ioaddr + DMA_CHAN_INTR_ENA(channel)); 196 reg_space[DMA_CHAN_RX_WATCHDOG(channel) / 4] = 197 readl(ioaddr + DMA_CHAN_RX_WATCHDOG(channel)); 198 reg_space[DMA_CHAN_SLOT_CTRL_STATUS(channel) / 4] = 199 readl(ioaddr + DMA_CHAN_SLOT_CTRL_STATUS(channel)); 200 reg_space[DMA_CHAN_CUR_TX_DESC(channel) / 4] = 201 readl(ioaddr + DMA_CHAN_CUR_TX_DESC(channel)); 202 reg_space[DMA_CHAN_CUR_RX_DESC(channel) / 4] = 203 readl(ioaddr + DMA_CHAN_CUR_RX_DESC(channel)); 204 reg_space[DMA_CHAN_CUR_TX_BUF_ADDR(channel) / 4] = 205 readl(ioaddr + DMA_CHAN_CUR_TX_BUF_ADDR(channel)); 206 reg_space[DMA_CHAN_CUR_RX_BUF_ADDR(channel) / 4] = 207 readl(ioaddr + DMA_CHAN_CUR_RX_BUF_ADDR(channel)); 208 reg_space[DMA_CHAN_STATUS(channel) / 4] = 209 readl(ioaddr + DMA_CHAN_STATUS(channel)); 210 } 211 212 static void dwmac4_dump_dma_regs(void __iomem *ioaddr, u32 *reg_space) 213 { 214 int i; 215 216 for (i = 0; i < DMA_CHANNEL_NB_MAX; i++) 217 _dwmac4_dump_dma_regs(ioaddr, i, reg_space); 218 } 219 220 static void dwmac4_rx_watchdog(void __iomem *ioaddr, u32 riwt, u32 queue) 221 { 222 writel(riwt, ioaddr + DMA_CHAN_RX_WATCHDOG(queue)); 223 } 224 225 static void dwmac4_dma_rx_chan_op_mode(void __iomem *ioaddr, int mode, 226 u32 channel, int fifosz, u8 qmode) 227 { 228 unsigned int rqs = fifosz / 256 - 1; 229 u32 mtl_rx_op, mtl_rx_int; 230 231 mtl_rx_op = readl(ioaddr + MTL_CHAN_RX_OP_MODE(channel)); 232 233 if (mode == SF_DMA_MODE) { 234 pr_debug("GMAC: enable RX store and forward mode\n"); 235 mtl_rx_op |= MTL_OP_MODE_RSF; 236 } else { 237 pr_debug("GMAC: disable RX SF mode (threshold %d)\n", mode); 238 mtl_rx_op &= ~MTL_OP_MODE_RSF; 239 mtl_rx_op &= MTL_OP_MODE_RTC_MASK; 240 if (mode <= 32) 241 mtl_rx_op |= MTL_OP_MODE_RTC_32; 242 else if (mode <= 64) 243 mtl_rx_op |= MTL_OP_MODE_RTC_64; 244 else if (mode <= 96) 245 mtl_rx_op |= MTL_OP_MODE_RTC_96; 246 else 247 mtl_rx_op |= MTL_OP_MODE_RTC_128; 248 } 249 250 mtl_rx_op &= ~MTL_OP_MODE_RQS_MASK; 251 mtl_rx_op |= rqs << MTL_OP_MODE_RQS_SHIFT; 252 253 /* Enable flow control only if each channel gets 4 KiB or more FIFO and 254 * only if channel is not an AVB channel. 255 */ 256 if ((fifosz >= 4096) && (qmode != MTL_QUEUE_AVB)) { 257 unsigned int rfd, rfa; 258 259 mtl_rx_op |= MTL_OP_MODE_EHFC; 260 261 /* Set Threshold for Activating Flow Control to min 2 frames, 262 * i.e. 1500 * 2 = 3000 bytes. 263 * 264 * Set Threshold for Deactivating Flow Control to min 1 frame, 265 * i.e. 1500 bytes. 266 */ 267 switch (fifosz) { 268 case 4096: 269 /* This violates the above formula because of FIFO size 270 * limit therefore overflow may occur in spite of this. 271 */ 272 rfd = 0x03; /* Full-2.5K */ 273 rfa = 0x01; /* Full-1.5K */ 274 break; 275 276 default: 277 rfd = 0x07; /* Full-4.5K */ 278 rfa = 0x04; /* Full-3K */ 279 break; 280 } 281 282 mtl_rx_op &= ~MTL_OP_MODE_RFD_MASK; 283 mtl_rx_op |= rfd << MTL_OP_MODE_RFD_SHIFT; 284 285 mtl_rx_op &= ~MTL_OP_MODE_RFA_MASK; 286 mtl_rx_op |= rfa << MTL_OP_MODE_RFA_SHIFT; 287 } 288 289 writel(mtl_rx_op, ioaddr + MTL_CHAN_RX_OP_MODE(channel)); 290 291 /* Enable MTL RX overflow */ 292 mtl_rx_int = readl(ioaddr + MTL_CHAN_INT_CTRL(channel)); 293 writel(mtl_rx_int | MTL_RX_OVERFLOW_INT_EN, 294 ioaddr + MTL_CHAN_INT_CTRL(channel)); 295 } 296 297 static void dwmac4_dma_tx_chan_op_mode(void __iomem *ioaddr, int mode, 298 u32 channel, int fifosz, u8 qmode) 299 { 300 u32 mtl_tx_op = readl(ioaddr + MTL_CHAN_TX_OP_MODE(channel)); 301 unsigned int tqs = fifosz / 256 - 1; 302 303 if (mode == SF_DMA_MODE) { 304 pr_debug("GMAC: enable TX store and forward mode\n"); 305 /* Transmit COE type 2 cannot be done in cut-through mode. */ 306 mtl_tx_op |= MTL_OP_MODE_TSF; 307 } else { 308 pr_debug("GMAC: disabling TX SF (threshold %d)\n", mode); 309 mtl_tx_op &= ~MTL_OP_MODE_TSF; 310 mtl_tx_op &= MTL_OP_MODE_TTC_MASK; 311 /* Set the transmit threshold */ 312 if (mode <= 32) 313 mtl_tx_op |= MTL_OP_MODE_TTC_32; 314 else if (mode <= 64) 315 mtl_tx_op |= MTL_OP_MODE_TTC_64; 316 else if (mode <= 96) 317 mtl_tx_op |= MTL_OP_MODE_TTC_96; 318 else if (mode <= 128) 319 mtl_tx_op |= MTL_OP_MODE_TTC_128; 320 else if (mode <= 192) 321 mtl_tx_op |= MTL_OP_MODE_TTC_192; 322 else if (mode <= 256) 323 mtl_tx_op |= MTL_OP_MODE_TTC_256; 324 else if (mode <= 384) 325 mtl_tx_op |= MTL_OP_MODE_TTC_384; 326 else 327 mtl_tx_op |= MTL_OP_MODE_TTC_512; 328 } 329 /* For an IP with DWC_EQOS_NUM_TXQ == 1, the fields TXQEN and TQS are RO 330 * with reset values: TXQEN on, TQS == DWC_EQOS_TXFIFO_SIZE. 331 * For an IP with DWC_EQOS_NUM_TXQ > 1, the fields TXQEN and TQS are R/W 332 * with reset values: TXQEN off, TQS 256 bytes. 333 * 334 * TXQEN must be written for multi-channel operation and TQS must 335 * reflect the available fifo size per queue (total fifo size / number 336 * of enabled queues). 337 */ 338 mtl_tx_op &= ~MTL_OP_MODE_TXQEN_MASK; 339 if (qmode != MTL_QUEUE_AVB) 340 mtl_tx_op |= MTL_OP_MODE_TXQEN; 341 else 342 mtl_tx_op |= MTL_OP_MODE_TXQEN_AV; 343 mtl_tx_op &= ~MTL_OP_MODE_TQS_MASK; 344 mtl_tx_op |= tqs << MTL_OP_MODE_TQS_SHIFT; 345 346 writel(mtl_tx_op, ioaddr + MTL_CHAN_TX_OP_MODE(channel)); 347 } 348 349 static void dwmac4_get_hw_feature(void __iomem *ioaddr, 350 struct dma_features *dma_cap) 351 { 352 u32 hw_cap = readl(ioaddr + GMAC_HW_FEATURE0); 353 354 /* MAC HW feature0 */ 355 dma_cap->mbps_10_100 = (hw_cap & GMAC_HW_FEAT_MIISEL); 356 dma_cap->mbps_1000 = (hw_cap & GMAC_HW_FEAT_GMIISEL) >> 1; 357 dma_cap->half_duplex = (hw_cap & GMAC_HW_FEAT_HDSEL) >> 2; 358 dma_cap->vlhash = (hw_cap & GMAC_HW_FEAT_VLHASH) >> 4; 359 dma_cap->multi_addr = (hw_cap & GMAC_HW_FEAT_ADDMAC) >> 18; 360 dma_cap->pcs = (hw_cap & GMAC_HW_FEAT_PCSSEL) >> 3; 361 dma_cap->sma_mdio = (hw_cap & GMAC_HW_FEAT_SMASEL) >> 5; 362 dma_cap->pmt_remote_wake_up = (hw_cap & GMAC_HW_FEAT_RWKSEL) >> 6; 363 dma_cap->pmt_magic_frame = (hw_cap & GMAC_HW_FEAT_MGKSEL) >> 7; 364 /* MMC */ 365 dma_cap->rmon = (hw_cap & GMAC_HW_FEAT_MMCSEL) >> 8; 366 /* IEEE 1588-2008 */ 367 dma_cap->atime_stamp = (hw_cap & GMAC_HW_FEAT_TSSEL) >> 12; 368 /* 802.3az - Energy-Efficient Ethernet (EEE) */ 369 dma_cap->eee = (hw_cap & GMAC_HW_FEAT_EEESEL) >> 13; 370 /* TX and RX csum */ 371 dma_cap->tx_coe = (hw_cap & GMAC_HW_FEAT_TXCOSEL) >> 14; 372 dma_cap->rx_coe = (hw_cap & GMAC_HW_FEAT_RXCOESEL) >> 16; 373 dma_cap->vlins = (hw_cap & GMAC_HW_FEAT_SAVLANINS) >> 27; 374 dma_cap->arpoffsel = (hw_cap & GMAC_HW_FEAT_ARPOFFSEL) >> 9; 375 376 /* MAC HW feature1 */ 377 hw_cap = readl(ioaddr + GMAC_HW_FEATURE1); 378 dma_cap->l3l4fnum = (hw_cap & GMAC_HW_FEAT_L3L4FNUM) >> 27; 379 dma_cap->hash_tb_sz = (hw_cap & GMAC_HW_HASH_TB_SZ) >> 24; 380 dma_cap->av = (hw_cap & GMAC_HW_FEAT_AVSEL) >> 20; 381 dma_cap->tsoen = (hw_cap & GMAC_HW_TSOEN) >> 18; 382 dma_cap->sphen = (hw_cap & GMAC_HW_FEAT_SPHEN) >> 17; 383 384 dma_cap->addr64 = (hw_cap & GMAC_HW_ADDR64) >> 14; 385 switch (dma_cap->addr64) { 386 case 0: 387 dma_cap->addr64 = 32; 388 break; 389 case 1: 390 dma_cap->addr64 = 40; 391 break; 392 case 2: 393 dma_cap->addr64 = 48; 394 break; 395 default: 396 dma_cap->addr64 = 32; 397 break; 398 } 399 400 /* RX and TX FIFO sizes are encoded as log2(n / 128). Undo that by 401 * shifting and store the sizes in bytes. 402 */ 403 dma_cap->tx_fifo_size = 128 << ((hw_cap & GMAC_HW_TXFIFOSIZE) >> 6); 404 dma_cap->rx_fifo_size = 128 << ((hw_cap & GMAC_HW_RXFIFOSIZE) >> 0); 405 /* MAC HW feature2 */ 406 hw_cap = readl(ioaddr + GMAC_HW_FEATURE2); 407 /* TX and RX number of channels */ 408 dma_cap->number_rx_channel = 409 ((hw_cap & GMAC_HW_FEAT_RXCHCNT) >> 12) + 1; 410 dma_cap->number_tx_channel = 411 ((hw_cap & GMAC_HW_FEAT_TXCHCNT) >> 18) + 1; 412 /* TX and RX number of queues */ 413 dma_cap->number_rx_queues = 414 ((hw_cap & GMAC_HW_FEAT_RXQCNT) >> 0) + 1; 415 dma_cap->number_tx_queues = 416 ((hw_cap & GMAC_HW_FEAT_TXQCNT) >> 6) + 1; 417 /* PPS output */ 418 dma_cap->pps_out_num = (hw_cap & GMAC_HW_FEAT_PPSOUTNUM) >> 24; 419 420 /* IEEE 1588-2002 */ 421 dma_cap->time_stamp = 0; 422 /* Number of Auxiliary Snapshot Inputs */ 423 dma_cap->aux_snapshot_n = (hw_cap & GMAC_HW_FEAT_AUXSNAPNUM) >> 28; 424 425 /* MAC HW feature3 */ 426 hw_cap = readl(ioaddr + GMAC_HW_FEATURE3); 427 428 /* 5.10 Features */ 429 dma_cap->asp = (hw_cap & GMAC_HW_FEAT_ASP) >> 28; 430 dma_cap->tbssel = (hw_cap & GMAC_HW_FEAT_TBSSEL) >> 27; 431 dma_cap->fpesel = (hw_cap & GMAC_HW_FEAT_FPESEL) >> 26; 432 dma_cap->estwid = (hw_cap & GMAC_HW_FEAT_ESTWID) >> 20; 433 dma_cap->estdep = (hw_cap & GMAC_HW_FEAT_ESTDEP) >> 17; 434 dma_cap->estsel = (hw_cap & GMAC_HW_FEAT_ESTSEL) >> 16; 435 dma_cap->frpes = (hw_cap & GMAC_HW_FEAT_FRPES) >> 13; 436 dma_cap->frpbs = (hw_cap & GMAC_HW_FEAT_FRPBS) >> 11; 437 dma_cap->frpsel = (hw_cap & GMAC_HW_FEAT_FRPSEL) >> 10; 438 dma_cap->dvlan = (hw_cap & GMAC_HW_FEAT_DVLAN) >> 5; 439 } 440 441 /* Enable/disable TSO feature and set MSS */ 442 static void dwmac4_enable_tso(void __iomem *ioaddr, bool en, u32 chan) 443 { 444 u32 value; 445 446 if (en) { 447 /* enable TSO */ 448 value = readl(ioaddr + DMA_CHAN_TX_CONTROL(chan)); 449 writel(value | DMA_CONTROL_TSE, 450 ioaddr + DMA_CHAN_TX_CONTROL(chan)); 451 } else { 452 /* enable TSO */ 453 value = readl(ioaddr + DMA_CHAN_TX_CONTROL(chan)); 454 writel(value & ~DMA_CONTROL_TSE, 455 ioaddr + DMA_CHAN_TX_CONTROL(chan)); 456 } 457 } 458 459 static void dwmac4_qmode(void __iomem *ioaddr, u32 channel, u8 qmode) 460 { 461 u32 mtl_tx_op = readl(ioaddr + MTL_CHAN_TX_OP_MODE(channel)); 462 463 mtl_tx_op &= ~MTL_OP_MODE_TXQEN_MASK; 464 if (qmode != MTL_QUEUE_AVB) 465 mtl_tx_op |= MTL_OP_MODE_TXQEN; 466 else 467 mtl_tx_op |= MTL_OP_MODE_TXQEN_AV; 468 469 writel(mtl_tx_op, ioaddr + MTL_CHAN_TX_OP_MODE(channel)); 470 } 471 472 static void dwmac4_set_bfsize(void __iomem *ioaddr, int bfsize, u32 chan) 473 { 474 u32 value = readl(ioaddr + DMA_CHAN_RX_CONTROL(chan)); 475 476 value &= ~DMA_RBSZ_MASK; 477 value |= (bfsize << DMA_RBSZ_SHIFT) & DMA_RBSZ_MASK; 478 479 writel(value, ioaddr + DMA_CHAN_RX_CONTROL(chan)); 480 } 481 482 static void dwmac4_enable_sph(void __iomem *ioaddr, bool en, u32 chan) 483 { 484 u32 value = readl(ioaddr + GMAC_EXT_CONFIG); 485 486 value &= ~GMAC_CONFIG_HDSMS; 487 value |= GMAC_CONFIG_HDSMS_256; /* Segment max 256 bytes */ 488 writel(value, ioaddr + GMAC_EXT_CONFIG); 489 490 value = readl(ioaddr + DMA_CHAN_CONTROL(chan)); 491 if (en) 492 value |= DMA_CONTROL_SPH; 493 else 494 value &= ~DMA_CONTROL_SPH; 495 writel(value, ioaddr + DMA_CHAN_CONTROL(chan)); 496 } 497 498 static int dwmac4_enable_tbs(void __iomem *ioaddr, bool en, u32 chan) 499 { 500 u32 value = readl(ioaddr + DMA_CHAN_TX_CONTROL(chan)); 501 502 if (en) 503 value |= DMA_CONTROL_EDSE; 504 else 505 value &= ~DMA_CONTROL_EDSE; 506 507 writel(value, ioaddr + DMA_CHAN_TX_CONTROL(chan)); 508 509 value = readl(ioaddr + DMA_CHAN_TX_CONTROL(chan)) & DMA_CONTROL_EDSE; 510 if (en && !value) 511 return -EIO; 512 513 writel(DMA_TBS_DEF_FTOS, ioaddr + DMA_TBS_CTRL); 514 return 0; 515 } 516 517 const struct stmmac_dma_ops dwmac4_dma_ops = { 518 .reset = dwmac4_dma_reset, 519 .init = dwmac4_dma_init, 520 .init_chan = dwmac4_dma_init_channel, 521 .init_rx_chan = dwmac4_dma_init_rx_chan, 522 .init_tx_chan = dwmac4_dma_init_tx_chan, 523 .axi = dwmac4_dma_axi, 524 .dump_regs = dwmac4_dump_dma_regs, 525 .dma_rx_mode = dwmac4_dma_rx_chan_op_mode, 526 .dma_tx_mode = dwmac4_dma_tx_chan_op_mode, 527 .enable_dma_irq = dwmac4_enable_dma_irq, 528 .disable_dma_irq = dwmac4_disable_dma_irq, 529 .start_tx = dwmac4_dma_start_tx, 530 .stop_tx = dwmac4_dma_stop_tx, 531 .start_rx = dwmac4_dma_start_rx, 532 .stop_rx = dwmac4_dma_stop_rx, 533 .dma_interrupt = dwmac4_dma_interrupt, 534 .get_hw_feature = dwmac4_get_hw_feature, 535 .rx_watchdog = dwmac4_rx_watchdog, 536 .set_rx_ring_len = dwmac4_set_rx_ring_len, 537 .set_tx_ring_len = dwmac4_set_tx_ring_len, 538 .set_rx_tail_ptr = dwmac4_set_rx_tail_ptr, 539 .set_tx_tail_ptr = dwmac4_set_tx_tail_ptr, 540 .enable_tso = dwmac4_enable_tso, 541 .qmode = dwmac4_qmode, 542 .set_bfsize = dwmac4_set_bfsize, 543 .enable_sph = dwmac4_enable_sph, 544 }; 545 546 const struct stmmac_dma_ops dwmac410_dma_ops = { 547 .reset = dwmac4_dma_reset, 548 .init = dwmac4_dma_init, 549 .init_chan = dwmac410_dma_init_channel, 550 .init_rx_chan = dwmac4_dma_init_rx_chan, 551 .init_tx_chan = dwmac4_dma_init_tx_chan, 552 .axi = dwmac4_dma_axi, 553 .dump_regs = dwmac4_dump_dma_regs, 554 .dma_rx_mode = dwmac4_dma_rx_chan_op_mode, 555 .dma_tx_mode = dwmac4_dma_tx_chan_op_mode, 556 .enable_dma_irq = dwmac410_enable_dma_irq, 557 .disable_dma_irq = dwmac4_disable_dma_irq, 558 .start_tx = dwmac4_dma_start_tx, 559 .stop_tx = dwmac4_dma_stop_tx, 560 .start_rx = dwmac4_dma_start_rx, 561 .stop_rx = dwmac4_dma_stop_rx, 562 .dma_interrupt = dwmac4_dma_interrupt, 563 .get_hw_feature = dwmac4_get_hw_feature, 564 .rx_watchdog = dwmac4_rx_watchdog, 565 .set_rx_ring_len = dwmac4_set_rx_ring_len, 566 .set_tx_ring_len = dwmac4_set_tx_ring_len, 567 .set_rx_tail_ptr = dwmac4_set_rx_tail_ptr, 568 .set_tx_tail_ptr = dwmac4_set_tx_tail_ptr, 569 .enable_tso = dwmac4_enable_tso, 570 .qmode = dwmac4_qmode, 571 .set_bfsize = dwmac4_set_bfsize, 572 .enable_sph = dwmac4_enable_sph, 573 .enable_tbs = dwmac4_enable_tbs, 574 }; 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