1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * sata_mv.c - Marvell SATA support 4 * 5 * Copyright 2008-2009: Marvell Corporation, all rights reserved. 6 * Copyright 2005: EMC Corporation, all rights reserved. 7 * Copyright 2005 Red Hat, Inc. All rights reserved. 8 * 9 * Originally written by Brett Russ. 10 * Extensive overhaul and enhancement by Mark Lord <mlord@pobox.com>. 11 * 12 * Please ALWAYS copy linux-ide@vger.kernel.org on emails. 13 */ 14 15 /* 16 * sata_mv TODO list: 17 * 18 * --> Develop a low-power-consumption strategy, and implement it. 19 * 20 * --> Add sysfs attributes for per-chip / per-HC IRQ coalescing thresholds. 21 * 22 * --> [Experiment, Marvell value added] Is it possible to use target 23 * mode to cross-connect two Linux boxes with Marvell cards? If so, 24 * creating LibATA target mode support would be very interesting. 25 * 26 * Target mode, for those without docs, is the ability to directly 27 * connect two SATA ports. 28 */ 29 30 /* 31 * 80x1-B2 errata PCI#11: 32 * 33 * Users of the 6041/6081 Rev.B2 chips (current is C0) 34 * should be careful to insert those cards only onto PCI-X bus #0, 35 * and only in device slots 0..7, not higher. The chips may not 36 * work correctly otherwise (note: this is a pretty rare condition). 37 */ 38 39 #include <linux/kernel.h> 40 #include <linux/module.h> 41 #include <linux/pci.h> 42 #include <linux/init.h> 43 #include <linux/blkdev.h> 44 #include <linux/delay.h> 45 #include <linux/interrupt.h> 46 #include <linux/dmapool.h> 47 #include <linux/dma-mapping.h> 48 #include <linux/device.h> 49 #include <linux/clk.h> 50 #include <linux/phy/phy.h> 51 #include <linux/platform_device.h> 52 #include <linux/ata_platform.h> 53 #include <linux/mbus.h> 54 #include <linux/bitops.h> 55 #include <linux/gfp.h> 56 #include <linux/of.h> 57 #include <linux/of_irq.h> 58 #include <scsi/scsi_host.h> 59 #include <scsi/scsi_cmnd.h> 60 #include <scsi/scsi_device.h> 61 #include <linux/libata.h> 62 63 #define DRV_NAME "sata_mv" 64 #define DRV_VERSION "1.28" 65 66 /* 67 * module options 68 */ 69 70 #ifdef CONFIG_PCI 71 static int msi; 72 module_param(msi, int, S_IRUGO); 73 MODULE_PARM_DESC(msi, "Enable use of PCI MSI (0=off, 1=on)"); 74 #endif 75 76 static int irq_coalescing_io_count; 77 module_param(irq_coalescing_io_count, int, S_IRUGO); 78 MODULE_PARM_DESC(irq_coalescing_io_count, 79 "IRQ coalescing I/O count threshold (0..255)"); 80 81 static int irq_coalescing_usecs; 82 module_param(irq_coalescing_usecs, int, S_IRUGO); 83 MODULE_PARM_DESC(irq_coalescing_usecs, 84 "IRQ coalescing time threshold in usecs"); 85 86 enum { 87 /* BAR's are enumerated in terms of pci_resource_start() terms */ 88 MV_PRIMARY_BAR = 0, /* offset 0x10: memory space */ 89 MV_IO_BAR = 2, /* offset 0x18: IO space */ 90 MV_MISC_BAR = 3, /* offset 0x1c: FLASH, NVRAM, SRAM */ 91 92 MV_MAJOR_REG_AREA_SZ = 0x10000, /* 64KB */ 93 MV_MINOR_REG_AREA_SZ = 0x2000, /* 8KB */ 94 95 /* For use with both IRQ coalescing methods ("all ports" or "per-HC" */ 96 COAL_CLOCKS_PER_USEC = 150, /* for calculating COAL_TIMEs */ 97 MAX_COAL_TIME_THRESHOLD = ((1 << 24) - 1), /* internal clocks count */ 98 MAX_COAL_IO_COUNT = 255, /* completed I/O count */ 99 100 MV_PCI_REG_BASE = 0, 101 102 /* 103 * Per-chip ("all ports") interrupt coalescing feature. 104 * This is only for GEN_II / GEN_IIE hardware. 105 * 106 * Coalescing defers the interrupt until either the IO_THRESHOLD 107 * (count of completed I/Os) is met, or the TIME_THRESHOLD is met. 108 */ 109 COAL_REG_BASE = 0x18000, 110 IRQ_COAL_CAUSE = (COAL_REG_BASE + 0x08), 111 ALL_PORTS_COAL_IRQ = (1 << 4), /* all ports irq event */ 112 113 IRQ_COAL_IO_THRESHOLD = (COAL_REG_BASE + 0xcc), 114 IRQ_COAL_TIME_THRESHOLD = (COAL_REG_BASE + 0xd0), 115 116 /* 117 * Registers for the (unused here) transaction coalescing feature: 118 */ 119 TRAN_COAL_CAUSE_LO = (COAL_REG_BASE + 0x88), 120 TRAN_COAL_CAUSE_HI = (COAL_REG_BASE + 0x8c), 121 122 SATAHC0_REG_BASE = 0x20000, 123 FLASH_CTL = 0x1046c, 124 GPIO_PORT_CTL = 0x104f0, 125 RESET_CFG = 0x180d8, 126 127 MV_PCI_REG_SZ = MV_MAJOR_REG_AREA_SZ, 128 MV_SATAHC_REG_SZ = MV_MAJOR_REG_AREA_SZ, 129 MV_SATAHC_ARBTR_REG_SZ = MV_MINOR_REG_AREA_SZ, /* arbiter */ 130 MV_PORT_REG_SZ = MV_MINOR_REG_AREA_SZ, 131 132 MV_MAX_Q_DEPTH = 32, 133 MV_MAX_Q_DEPTH_MASK = MV_MAX_Q_DEPTH - 1, 134 135 /* CRQB needs alignment on a 1KB boundary. Size == 1KB 136 * CRPB needs alignment on a 256B boundary. Size == 256B 137 * ePRD (SG) entries need alignment on a 16B boundary. Size == 16B 138 */ 139 MV_CRQB_Q_SZ = (32 * MV_MAX_Q_DEPTH), 140 MV_CRPB_Q_SZ = (8 * MV_MAX_Q_DEPTH), 141 MV_MAX_SG_CT = 256, 142 MV_SG_TBL_SZ = (16 * MV_MAX_SG_CT), 143 144 /* Determine hc from 0-7 port: hc = port >> MV_PORT_HC_SHIFT */ 145 MV_PORT_HC_SHIFT = 2, 146 MV_PORTS_PER_HC = (1 << MV_PORT_HC_SHIFT), /* 4 */ 147 /* Determine hc port from 0-7 port: hardport = port & MV_PORT_MASK */ 148 MV_PORT_MASK = (MV_PORTS_PER_HC - 1), /* 3 */ 149 150 /* Host Flags */ 151 MV_FLAG_DUAL_HC = (1 << 30), /* two SATA Host Controllers */ 152 153 MV_COMMON_FLAGS = ATA_FLAG_SATA | ATA_FLAG_PIO_POLLING, 154 155 MV_GEN_I_FLAGS = MV_COMMON_FLAGS | ATA_FLAG_NO_ATAPI, 156 157 MV_GEN_II_FLAGS = MV_COMMON_FLAGS | ATA_FLAG_NCQ | 158 ATA_FLAG_PMP | ATA_FLAG_ACPI_SATA, 159 160 MV_GEN_IIE_FLAGS = MV_GEN_II_FLAGS | ATA_FLAG_AN, 161 162 CRQB_FLAG_READ = (1 << 0), 163 CRQB_TAG_SHIFT = 1, 164 CRQB_IOID_SHIFT = 6, /* CRQB Gen-II/IIE IO Id shift */ 165 CRQB_PMP_SHIFT = 12, /* CRQB Gen-II/IIE PMP shift */ 166 CRQB_HOSTQ_SHIFT = 17, /* CRQB Gen-II/IIE HostQueTag shift */ 167 CRQB_CMD_ADDR_SHIFT = 8, 168 CRQB_CMD_CS = (0x2 << 11), 169 CRQB_CMD_LAST = (1 << 15), 170 171 CRPB_FLAG_STATUS_SHIFT = 8, 172 CRPB_IOID_SHIFT_6 = 5, /* CRPB Gen-II IO Id shift */ 173 CRPB_IOID_SHIFT_7 = 7, /* CRPB Gen-IIE IO Id shift */ 174 175 EPRD_FLAG_END_OF_TBL = (1 << 31), 176 177 /* PCI interface registers */ 178 179 MV_PCI_COMMAND = 0xc00, 180 MV_PCI_COMMAND_MWRCOM = (1 << 4), /* PCI Master Write Combining */ 181 MV_PCI_COMMAND_MRDTRIG = (1 << 7), /* PCI Master Read Trigger */ 182 183 PCI_MAIN_CMD_STS = 0xd30, 184 STOP_PCI_MASTER = (1 << 2), 185 PCI_MASTER_EMPTY = (1 << 3), 186 GLOB_SFT_RST = (1 << 4), 187 188 MV_PCI_MODE = 0xd00, 189 MV_PCI_MODE_MASK = 0x30, 190 191 MV_PCI_EXP_ROM_BAR_CTL = 0xd2c, 192 MV_PCI_DISC_TIMER = 0xd04, 193 MV_PCI_MSI_TRIGGER = 0xc38, 194 MV_PCI_SERR_MASK = 0xc28, 195 MV_PCI_XBAR_TMOUT = 0x1d04, 196 MV_PCI_ERR_LOW_ADDRESS = 0x1d40, 197 MV_PCI_ERR_HIGH_ADDRESS = 0x1d44, 198 MV_PCI_ERR_ATTRIBUTE = 0x1d48, 199 MV_PCI_ERR_COMMAND = 0x1d50, 200 201 PCI_IRQ_CAUSE = 0x1d58, 202 PCI_IRQ_MASK = 0x1d5c, 203 PCI_UNMASK_ALL_IRQS = 0x7fffff, /* bits 22-0 */ 204 205 PCIE_IRQ_CAUSE = 0x1900, 206 PCIE_IRQ_MASK = 0x1910, 207 PCIE_UNMASK_ALL_IRQS = 0x40a, /* assorted bits */ 208 209 /* Host Controller Main Interrupt Cause/Mask registers (1 per-chip) */ 210 PCI_HC_MAIN_IRQ_CAUSE = 0x1d60, 211 PCI_HC_MAIN_IRQ_MASK = 0x1d64, 212 SOC_HC_MAIN_IRQ_CAUSE = 0x20020, 213 SOC_HC_MAIN_IRQ_MASK = 0x20024, 214 ERR_IRQ = (1 << 0), /* shift by (2 * port #) */ 215 DONE_IRQ = (1 << 1), /* shift by (2 * port #) */ 216 HC0_IRQ_PEND = 0x1ff, /* bits 0-8 = HC0's ports */ 217 HC_SHIFT = 9, /* bits 9-17 = HC1's ports */ 218 DONE_IRQ_0_3 = 0x000000aa, /* DONE_IRQ ports 0,1,2,3 */ 219 DONE_IRQ_4_7 = (DONE_IRQ_0_3 << HC_SHIFT), /* 4,5,6,7 */ 220 PCI_ERR = (1 << 18), 221 TRAN_COAL_LO_DONE = (1 << 19), /* transaction coalescing */ 222 TRAN_COAL_HI_DONE = (1 << 20), /* transaction coalescing */ 223 PORTS_0_3_COAL_DONE = (1 << 8), /* HC0 IRQ coalescing */ 224 PORTS_4_7_COAL_DONE = (1 << 17), /* HC1 IRQ coalescing */ 225 ALL_PORTS_COAL_DONE = (1 << 21), /* GEN_II(E) IRQ coalescing */ 226 GPIO_INT = (1 << 22), 227 SELF_INT = (1 << 23), 228 TWSI_INT = (1 << 24), 229 HC_MAIN_RSVD = (0x7f << 25), /* bits 31-25 */ 230 HC_MAIN_RSVD_5 = (0x1fff << 19), /* bits 31-19 */ 231 HC_MAIN_RSVD_SOC = (0x3fffffb << 6), /* bits 31-9, 7-6 */ 232 233 /* SATAHC registers */ 234 HC_CFG = 0x00, 235 236 HC_IRQ_CAUSE = 0x14, 237 DMA_IRQ = (1 << 0), /* shift by port # */ 238 HC_COAL_IRQ = (1 << 4), /* IRQ coalescing */ 239 DEV_IRQ = (1 << 8), /* shift by port # */ 240 241 /* 242 * Per-HC (Host-Controller) interrupt coalescing feature. 243 * This is present on all chip generations. 244 * 245 * Coalescing defers the interrupt until either the IO_THRESHOLD 246 * (count of completed I/Os) is met, or the TIME_THRESHOLD is met. 247 */ 248 HC_IRQ_COAL_IO_THRESHOLD = 0x000c, 249 HC_IRQ_COAL_TIME_THRESHOLD = 0x0010, 250 251 SOC_LED_CTRL = 0x2c, 252 SOC_LED_CTRL_BLINK = (1 << 0), /* Active LED blink */ 253 SOC_LED_CTRL_ACT_PRESENCE = (1 << 2), /* Multiplex dev presence */ 254 /* with dev activity LED */ 255 256 /* Shadow block registers */ 257 SHD_BLK = 0x100, 258 SHD_CTL_AST = 0x20, /* ofs from SHD_BLK */ 259 260 /* SATA registers */ 261 SATA_STATUS = 0x300, /* ctrl, err regs follow status */ 262 SATA_ACTIVE = 0x350, 263 FIS_IRQ_CAUSE = 0x364, 264 FIS_IRQ_CAUSE_AN = (1 << 9), /* async notification */ 265 266 LTMODE = 0x30c, /* requires read-after-write */ 267 LTMODE_BIT8 = (1 << 8), /* unknown, but necessary */ 268 269 PHY_MODE2 = 0x330, 270 PHY_MODE3 = 0x310, 271 272 PHY_MODE4 = 0x314, /* requires read-after-write */ 273 PHY_MODE4_CFG_MASK = 0x00000003, /* phy internal config field */ 274 PHY_MODE4_CFG_VALUE = 0x00000001, /* phy internal config field */ 275 PHY_MODE4_RSVD_ZEROS = 0x5de3fffa, /* Gen2e always write zeros */ 276 PHY_MODE4_RSVD_ONES = 0x00000005, /* Gen2e always write ones */ 277 278 SATA_IFCTL = 0x344, 279 SATA_TESTCTL = 0x348, 280 SATA_IFSTAT = 0x34c, 281 VENDOR_UNIQUE_FIS = 0x35c, 282 283 FISCFG = 0x360, 284 FISCFG_WAIT_DEV_ERR = (1 << 8), /* wait for host on DevErr */ 285 FISCFG_SINGLE_SYNC = (1 << 16), /* SYNC on DMA activation */ 286 287 PHY_MODE9_GEN2 = 0x398, 288 PHY_MODE9_GEN1 = 0x39c, 289 PHYCFG_OFS = 0x3a0, /* only in 65n devices */ 290 291 MV5_PHY_MODE = 0x74, 292 MV5_LTMODE = 0x30, 293 MV5_PHY_CTL = 0x0C, 294 SATA_IFCFG = 0x050, 295 LP_PHY_CTL = 0x058, 296 LP_PHY_CTL_PIN_PU_PLL = (1 << 0), 297 LP_PHY_CTL_PIN_PU_RX = (1 << 1), 298 LP_PHY_CTL_PIN_PU_TX = (1 << 2), 299 LP_PHY_CTL_GEN_TX_3G = (1 << 5), 300 LP_PHY_CTL_GEN_RX_3G = (1 << 9), 301 302 MV_M2_PREAMP_MASK = 0x7e0, 303 304 /* Port registers */ 305 EDMA_CFG = 0, 306 EDMA_CFG_Q_DEPTH = 0x1f, /* max device queue depth */ 307 EDMA_CFG_NCQ = (1 << 5), /* for R/W FPDMA queued */ 308 EDMA_CFG_NCQ_GO_ON_ERR = (1 << 14), /* continue on error */ 309 EDMA_CFG_RD_BRST_EXT = (1 << 11), /* read burst 512B */ 310 EDMA_CFG_WR_BUFF_LEN = (1 << 13), /* write buffer 512B */ 311 EDMA_CFG_EDMA_FBS = (1 << 16), /* EDMA FIS-Based Switching */ 312 EDMA_CFG_FBS = (1 << 26), /* FIS-Based Switching */ 313 314 EDMA_ERR_IRQ_CAUSE = 0x8, 315 EDMA_ERR_IRQ_MASK = 0xc, 316 EDMA_ERR_D_PAR = (1 << 0), /* UDMA data parity err */ 317 EDMA_ERR_PRD_PAR = (1 << 1), /* UDMA PRD parity err */ 318 EDMA_ERR_DEV = (1 << 2), /* device error */ 319 EDMA_ERR_DEV_DCON = (1 << 3), /* device disconnect */ 320 EDMA_ERR_DEV_CON = (1 << 4), /* device connected */ 321 EDMA_ERR_SERR = (1 << 5), /* SError bits [WBDST] raised */ 322 EDMA_ERR_SELF_DIS = (1 << 7), /* Gen II/IIE self-disable */ 323 EDMA_ERR_SELF_DIS_5 = (1 << 8), /* Gen I self-disable */ 324 EDMA_ERR_BIST_ASYNC = (1 << 8), /* BIST FIS or Async Notify */ 325 EDMA_ERR_TRANS_IRQ_7 = (1 << 8), /* Gen IIE transprt layer irq */ 326 EDMA_ERR_CRQB_PAR = (1 << 9), /* CRQB parity error */ 327 EDMA_ERR_CRPB_PAR = (1 << 10), /* CRPB parity error */ 328 EDMA_ERR_INTRL_PAR = (1 << 11), /* internal parity error */ 329 EDMA_ERR_IORDY = (1 << 12), /* IORdy timeout */ 330 331 EDMA_ERR_LNK_CTRL_RX = (0xf << 13), /* link ctrl rx error */ 332 EDMA_ERR_LNK_CTRL_RX_0 = (1 << 13), /* transient: CRC err */ 333 EDMA_ERR_LNK_CTRL_RX_1 = (1 << 14), /* transient: FIFO err */ 334 EDMA_ERR_LNK_CTRL_RX_2 = (1 << 15), /* fatal: caught SYNC */ 335 EDMA_ERR_LNK_CTRL_RX_3 = (1 << 16), /* transient: FIS rx err */ 336 337 EDMA_ERR_LNK_DATA_RX = (0xf << 17), /* link data rx error */ 338 339 EDMA_ERR_LNK_CTRL_TX = (0x1f << 21), /* link ctrl tx error */ 340 EDMA_ERR_LNK_CTRL_TX_0 = (1 << 21), /* transient: CRC err */ 341 EDMA_ERR_LNK_CTRL_TX_1 = (1 << 22), /* transient: FIFO err */ 342 EDMA_ERR_LNK_CTRL_TX_2 = (1 << 23), /* transient: caught SYNC */ 343 EDMA_ERR_LNK_CTRL_TX_3 = (1 << 24), /* transient: caught DMAT */ 344 EDMA_ERR_LNK_CTRL_TX_4 = (1 << 25), /* transient: FIS collision */ 345 346 EDMA_ERR_LNK_DATA_TX = (0x1f << 26), /* link data tx error */ 347 348 EDMA_ERR_TRANS_PROTO = (1 << 31), /* transport protocol error */ 349 EDMA_ERR_OVERRUN_5 = (1 << 5), 350 EDMA_ERR_UNDERRUN_5 = (1 << 6), 351 352 EDMA_ERR_IRQ_TRANSIENT = EDMA_ERR_LNK_CTRL_RX_0 | 353 EDMA_ERR_LNK_CTRL_RX_1 | 354 EDMA_ERR_LNK_CTRL_RX_3 | 355 EDMA_ERR_LNK_CTRL_TX, 356 357 EDMA_EH_FREEZE = EDMA_ERR_D_PAR | 358 EDMA_ERR_PRD_PAR | 359 EDMA_ERR_DEV_DCON | 360 EDMA_ERR_DEV_CON | 361 EDMA_ERR_SERR | 362 EDMA_ERR_SELF_DIS | 363 EDMA_ERR_CRQB_PAR | 364 EDMA_ERR_CRPB_PAR | 365 EDMA_ERR_INTRL_PAR | 366 EDMA_ERR_IORDY | 367 EDMA_ERR_LNK_CTRL_RX_2 | 368 EDMA_ERR_LNK_DATA_RX | 369 EDMA_ERR_LNK_DATA_TX | 370 EDMA_ERR_TRANS_PROTO, 371 372 EDMA_EH_FREEZE_5 = EDMA_ERR_D_PAR | 373 EDMA_ERR_PRD_PAR | 374 EDMA_ERR_DEV_DCON | 375 EDMA_ERR_DEV_CON | 376 EDMA_ERR_OVERRUN_5 | 377 EDMA_ERR_UNDERRUN_5 | 378 EDMA_ERR_SELF_DIS_5 | 379 EDMA_ERR_CRQB_PAR | 380 EDMA_ERR_CRPB_PAR | 381 EDMA_ERR_INTRL_PAR | 382 EDMA_ERR_IORDY, 383 384 EDMA_REQ_Q_BASE_HI = 0x10, 385 EDMA_REQ_Q_IN_PTR = 0x14, /* also contains BASE_LO */ 386 387 EDMA_REQ_Q_OUT_PTR = 0x18, 388 EDMA_REQ_Q_PTR_SHIFT = 5, 389 390 EDMA_RSP_Q_BASE_HI = 0x1c, 391 EDMA_RSP_Q_IN_PTR = 0x20, 392 EDMA_RSP_Q_OUT_PTR = 0x24, /* also contains BASE_LO */ 393 EDMA_RSP_Q_PTR_SHIFT = 3, 394 395 EDMA_CMD = 0x28, /* EDMA command register */ 396 EDMA_EN = (1 << 0), /* enable EDMA */ 397 EDMA_DS = (1 << 1), /* disable EDMA; self-negated */ 398 EDMA_RESET = (1 << 2), /* reset eng/trans/link/phy */ 399 400 EDMA_STATUS = 0x30, /* EDMA engine status */ 401 EDMA_STATUS_CACHE_EMPTY = (1 << 6), /* GenIIe command cache empty */ 402 EDMA_STATUS_IDLE = (1 << 7), /* GenIIe EDMA enabled/idle */ 403 404 EDMA_IORDY_TMOUT = 0x34, 405 EDMA_ARB_CFG = 0x38, 406 407 EDMA_HALTCOND = 0x60, /* GenIIe halt conditions */ 408 EDMA_UNKNOWN_RSVD = 0x6C, /* GenIIe unknown/reserved */ 409 410 BMDMA_CMD = 0x224, /* bmdma command register */ 411 BMDMA_STATUS = 0x228, /* bmdma status register */ 412 BMDMA_PRD_LOW = 0x22c, /* bmdma PRD addr 31:0 */ 413 BMDMA_PRD_HIGH = 0x230, /* bmdma PRD addr 63:32 */ 414 415 /* Host private flags (hp_flags) */ 416 MV_HP_FLAG_MSI = (1 << 0), 417 MV_HP_ERRATA_50XXB0 = (1 << 1), 418 MV_HP_ERRATA_50XXB2 = (1 << 2), 419 MV_HP_ERRATA_60X1B2 = (1 << 3), 420 MV_HP_ERRATA_60X1C0 = (1 << 4), 421 MV_HP_GEN_I = (1 << 6), /* Generation I: 50xx */ 422 MV_HP_GEN_II = (1 << 7), /* Generation II: 60xx */ 423 MV_HP_GEN_IIE = (1 << 8), /* Generation IIE: 6042/7042 */ 424 MV_HP_PCIE = (1 << 9), /* PCIe bus/regs: 7042 */ 425 MV_HP_CUT_THROUGH = (1 << 10), /* can use EDMA cut-through */ 426 MV_HP_FLAG_SOC = (1 << 11), /* SystemOnChip, no PCI */ 427 MV_HP_QUIRK_LED_BLINK_EN = (1 << 12), /* is led blinking enabled? */ 428 MV_HP_FIX_LP_PHY_CTL = (1 << 13), /* fix speed in LP_PHY_CTL ? */ 429 430 /* Port private flags (pp_flags) */ 431 MV_PP_FLAG_EDMA_EN = (1 << 0), /* is EDMA engine enabled? */ 432 MV_PP_FLAG_NCQ_EN = (1 << 1), /* is EDMA set up for NCQ? */ 433 MV_PP_FLAG_FBS_EN = (1 << 2), /* is EDMA set up for FBS? */ 434 MV_PP_FLAG_DELAYED_EH = (1 << 3), /* delayed dev err handling */ 435 MV_PP_FLAG_FAKE_ATA_BUSY = (1 << 4), /* ignore initial ATA_DRDY */ 436 }; 437 438 #define IS_GEN_I(hpriv) ((hpriv)->hp_flags & MV_HP_GEN_I) 439 #define IS_GEN_II(hpriv) ((hpriv)->hp_flags & MV_HP_GEN_II) 440 #define IS_GEN_IIE(hpriv) ((hpriv)->hp_flags & MV_HP_GEN_IIE) 441 #define IS_PCIE(hpriv) ((hpriv)->hp_flags & MV_HP_PCIE) 442 #define IS_SOC(hpriv) ((hpriv)->hp_flags & MV_HP_FLAG_SOC) 443 444 #define WINDOW_CTRL(i) (0x20030 + ((i) << 4)) 445 #define WINDOW_BASE(i) (0x20034 + ((i) << 4)) 446 447 enum { 448 /* DMA boundary 0xffff is required by the s/g splitting 449 * we need on /length/ in mv_fill-sg(). 450 */ 451 MV_DMA_BOUNDARY = 0xffffU, 452 453 /* mask of register bits containing lower 32 bits 454 * of EDMA request queue DMA address 455 */ 456 EDMA_REQ_Q_BASE_LO_MASK = 0xfffffc00U, 457 458 /* ditto, for response queue */ 459 EDMA_RSP_Q_BASE_LO_MASK = 0xffffff00U, 460 }; 461 462 enum chip_type { 463 chip_504x, 464 chip_508x, 465 chip_5080, 466 chip_604x, 467 chip_608x, 468 chip_6042, 469 chip_7042, 470 chip_soc, 471 }; 472 473 /* Command ReQuest Block: 32B */ 474 struct mv_crqb { 475 __le32 sg_addr; 476 __le32 sg_addr_hi; 477 __le16 ctrl_flags; 478 __le16 ata_cmd[11]; 479 }; 480 481 struct mv_crqb_iie { 482 __le32 addr; 483 __le32 addr_hi; 484 __le32 flags; 485 __le32 len; 486 __le32 ata_cmd[4]; 487 }; 488 489 /* Command ResPonse Block: 8B */ 490 struct mv_crpb { 491 __le16 id; 492 __le16 flags; 493 __le32 tmstmp; 494 }; 495 496 /* EDMA Physical Region Descriptor (ePRD); A.K.A. SG */ 497 struct mv_sg { 498 __le32 addr; 499 __le32 flags_size; 500 __le32 addr_hi; 501 __le32 reserved; 502 }; 503 504 /* 505 * We keep a local cache of a few frequently accessed port 506 * registers here, to avoid having to read them (very slow) 507 * when switching between EDMA and non-EDMA modes. 508 */ 509 struct mv_cached_regs { 510 u32 fiscfg; 511 u32 ltmode; 512 u32 haltcond; 513 u32 unknown_rsvd; 514 }; 515 516 struct mv_port_priv { 517 struct mv_crqb *crqb; 518 dma_addr_t crqb_dma; 519 struct mv_crpb *crpb; 520 dma_addr_t crpb_dma; 521 struct mv_sg *sg_tbl[MV_MAX_Q_DEPTH]; 522 dma_addr_t sg_tbl_dma[MV_MAX_Q_DEPTH]; 523 524 unsigned int req_idx; 525 unsigned int resp_idx; 526 527 u32 pp_flags; 528 struct mv_cached_regs cached; 529 unsigned int delayed_eh_pmp_map; 530 }; 531 532 struct mv_port_signal { 533 u32 amps; 534 u32 pre; 535 }; 536 537 struct mv_host_priv { 538 u32 hp_flags; 539 unsigned int board_idx; 540 u32 main_irq_mask; 541 struct mv_port_signal signal[8]; 542 const struct mv_hw_ops *ops; 543 int n_ports; 544 void __iomem *base; 545 void __iomem *main_irq_cause_addr; 546 void __iomem *main_irq_mask_addr; 547 u32 irq_cause_offset; 548 u32 irq_mask_offset; 549 u32 unmask_all_irqs; 550 551 /* 552 * Needed on some devices that require their clocks to be enabled. 553 * These are optional: if the platform device does not have any 554 * clocks, they won't be used. Also, if the underlying hardware 555 * does not support the common clock framework (CONFIG_HAVE_CLK=n), 556 * all the clock operations become no-ops (see clk.h). 557 */ 558 struct clk *clk; 559 struct clk **port_clks; 560 /* 561 * Some devices have a SATA PHY which can be enabled/disabled 562 * in order to save power. These are optional: if the platform 563 * devices does not have any phy, they won't be used. 564 */ 565 struct phy **port_phys; 566 /* 567 * These consistent DMA memory pools give us guaranteed 568 * alignment for hardware-accessed data structures, 569 * and less memory waste in accomplishing the alignment. 570 */ 571 struct dma_pool *crqb_pool; 572 struct dma_pool *crpb_pool; 573 struct dma_pool *sg_tbl_pool; 574 }; 575 576 struct mv_hw_ops { 577 void (*phy_errata)(struct mv_host_priv *hpriv, void __iomem *mmio, 578 unsigned int port); 579 void (*enable_leds)(struct mv_host_priv *hpriv, void __iomem *mmio); 580 void (*read_preamp)(struct mv_host_priv *hpriv, int idx, 581 void __iomem *mmio); 582 int (*reset_hc)(struct ata_host *host, void __iomem *mmio, 583 unsigned int n_hc); 584 void (*reset_flash)(struct mv_host_priv *hpriv, void __iomem *mmio); 585 void (*reset_bus)(struct ata_host *host, void __iomem *mmio); 586 }; 587 588 static int mv_scr_read(struct ata_link *link, unsigned int sc_reg_in, u32 *val); 589 static int mv_scr_write(struct ata_link *link, unsigned int sc_reg_in, u32 val); 590 static int mv5_scr_read(struct ata_link *link, unsigned int sc_reg_in, u32 *val); 591 static int mv5_scr_write(struct ata_link *link, unsigned int sc_reg_in, u32 val); 592 static int mv_port_start(struct ata_port *ap); 593 static void mv_port_stop(struct ata_port *ap); 594 static int mv_qc_defer(struct ata_queued_cmd *qc); 595 static enum ata_completion_errors mv_qc_prep(struct ata_queued_cmd *qc); 596 static enum ata_completion_errors mv_qc_prep_iie(struct ata_queued_cmd *qc); 597 static unsigned int mv_qc_issue(struct ata_queued_cmd *qc); 598 static int mv_hardreset(struct ata_link *link, unsigned int *class, 599 unsigned long deadline); 600 static void mv_eh_freeze(struct ata_port *ap); 601 static void mv_eh_thaw(struct ata_port *ap); 602 static void mv6_dev_config(struct ata_device *dev); 603 604 static void mv5_phy_errata(struct mv_host_priv *hpriv, void __iomem *mmio, 605 unsigned int port); 606 static void mv5_enable_leds(struct mv_host_priv *hpriv, void __iomem *mmio); 607 static void mv5_read_preamp(struct mv_host_priv *hpriv, int idx, 608 void __iomem *mmio); 609 static int mv5_reset_hc(struct ata_host *host, void __iomem *mmio, 610 unsigned int n_hc); 611 static void mv5_reset_flash(struct mv_host_priv *hpriv, void __iomem *mmio); 612 static void mv5_reset_bus(struct ata_host *host, void __iomem *mmio); 613 614 static void mv6_phy_errata(struct mv_host_priv *hpriv, void __iomem *mmio, 615 unsigned int port); 616 static void mv6_enable_leds(struct mv_host_priv *hpriv, void __iomem *mmio); 617 static void mv6_read_preamp(struct mv_host_priv *hpriv, int idx, 618 void __iomem *mmio); 619 static int mv6_reset_hc(struct ata_host *host, void __iomem *mmio, 620 unsigned int n_hc); 621 static void mv6_reset_flash(struct mv_host_priv *hpriv, void __iomem *mmio); 622 static void mv_soc_enable_leds(struct mv_host_priv *hpriv, 623 void __iomem *mmio); 624 static void mv_soc_read_preamp(struct mv_host_priv *hpriv, int idx, 625 void __iomem *mmio); 626 static int mv_soc_reset_hc(struct ata_host *host, 627 void __iomem *mmio, unsigned int n_hc); 628 static void mv_soc_reset_flash(struct mv_host_priv *hpriv, 629 void __iomem *mmio); 630 static void mv_soc_reset_bus(struct ata_host *host, void __iomem *mmio); 631 static void mv_soc_65n_phy_errata(struct mv_host_priv *hpriv, 632 void __iomem *mmio, unsigned int port); 633 static void mv_reset_pci_bus(struct ata_host *host, void __iomem *mmio); 634 static void mv_reset_channel(struct mv_host_priv *hpriv, void __iomem *mmio, 635 unsigned int port_no); 636 static int mv_stop_edma(struct ata_port *ap); 637 static int mv_stop_edma_engine(void __iomem *port_mmio); 638 static void mv_edma_cfg(struct ata_port *ap, int want_ncq, int want_edma); 639 640 static void mv_pmp_select(struct ata_port *ap, int pmp); 641 static int mv_pmp_hardreset(struct ata_link *link, unsigned int *class, 642 unsigned long deadline); 643 static int mv_softreset(struct ata_link *link, unsigned int *class, 644 unsigned long deadline); 645 static void mv_pmp_error_handler(struct ata_port *ap); 646 static void mv_process_crpb_entries(struct ata_port *ap, 647 struct mv_port_priv *pp); 648 649 static void mv_sff_irq_clear(struct ata_port *ap); 650 static int mv_check_atapi_dma(struct ata_queued_cmd *qc); 651 static void mv_bmdma_setup(struct ata_queued_cmd *qc); 652 static void mv_bmdma_start(struct ata_queued_cmd *qc); 653 static void mv_bmdma_stop(struct ata_queued_cmd *qc); 654 static u8 mv_bmdma_status(struct ata_port *ap); 655 static u8 mv_sff_check_status(struct ata_port *ap); 656 657 /* .sg_tablesize is (MV_MAX_SG_CT / 2) in the structures below 658 * because we have to allow room for worst case splitting of 659 * PRDs for 64K boundaries in mv_fill_sg(). 660 */ 661 #ifdef CONFIG_PCI 662 static const struct scsi_host_template mv5_sht = { 663 ATA_BASE_SHT(DRV_NAME), 664 .sg_tablesize = MV_MAX_SG_CT / 2, 665 .dma_boundary = MV_DMA_BOUNDARY, 666 }; 667 #endif 668 static const struct scsi_host_template mv6_sht = { 669 __ATA_BASE_SHT(DRV_NAME), 670 .can_queue = MV_MAX_Q_DEPTH - 1, 671 .sg_tablesize = MV_MAX_SG_CT / 2, 672 .dma_boundary = MV_DMA_BOUNDARY, 673 .sdev_groups = ata_ncq_sdev_groups, 674 .change_queue_depth = ata_scsi_change_queue_depth, 675 .tag_alloc_policy = BLK_TAG_ALLOC_RR, 676 .slave_configure = ata_scsi_slave_config 677 }; 678 679 static struct ata_port_operations mv5_ops = { 680 .inherits = &ata_sff_port_ops, 681 682 .lost_interrupt = ATA_OP_NULL, 683 684 .qc_defer = mv_qc_defer, 685 .qc_prep = mv_qc_prep, 686 .qc_issue = mv_qc_issue, 687 688 .freeze = mv_eh_freeze, 689 .thaw = mv_eh_thaw, 690 .hardreset = mv_hardreset, 691 692 .scr_read = mv5_scr_read, 693 .scr_write = mv5_scr_write, 694 695 .port_start = mv_port_start, 696 .port_stop = mv_port_stop, 697 }; 698 699 static struct ata_port_operations mv6_ops = { 700 .inherits = &ata_bmdma_port_ops, 701 702 .lost_interrupt = ATA_OP_NULL, 703 704 .qc_defer = mv_qc_defer, 705 .qc_prep = mv_qc_prep, 706 .qc_issue = mv_qc_issue, 707 708 .dev_config = mv6_dev_config, 709 710 .freeze = mv_eh_freeze, 711 .thaw = mv_eh_thaw, 712 .hardreset = mv_hardreset, 713 .softreset = mv_softreset, 714 .pmp_hardreset = mv_pmp_hardreset, 715 .pmp_softreset = mv_softreset, 716 .error_handler = mv_pmp_error_handler, 717 718 .scr_read = mv_scr_read, 719 .scr_write = mv_scr_write, 720 721 .sff_check_status = mv_sff_check_status, 722 .sff_irq_clear = mv_sff_irq_clear, 723 .check_atapi_dma = mv_check_atapi_dma, 724 .bmdma_setup = mv_bmdma_setup, 725 .bmdma_start = mv_bmdma_start, 726 .bmdma_stop = mv_bmdma_stop, 727 .bmdma_status = mv_bmdma_status, 728 729 .port_start = mv_port_start, 730 .port_stop = mv_port_stop, 731 }; 732 733 static struct ata_port_operations mv_iie_ops = { 734 .inherits = &mv6_ops, 735 .dev_config = ATA_OP_NULL, 736 .qc_prep = mv_qc_prep_iie, 737 }; 738 739 static const struct ata_port_info mv_port_info[] = { 740 { /* chip_504x */ 741 .flags = MV_GEN_I_FLAGS, 742 .pio_mask = ATA_PIO4, 743 .udma_mask = ATA_UDMA6, 744 .port_ops = &mv5_ops, 745 }, 746 { /* chip_508x */ 747 .flags = MV_GEN_I_FLAGS | MV_FLAG_DUAL_HC, 748 .pio_mask = ATA_PIO4, 749 .udma_mask = ATA_UDMA6, 750 .port_ops = &mv5_ops, 751 }, 752 { /* chip_5080 */ 753 .flags = MV_GEN_I_FLAGS | MV_FLAG_DUAL_HC, 754 .pio_mask = ATA_PIO4, 755 .udma_mask = ATA_UDMA6, 756 .port_ops = &mv5_ops, 757 }, 758 { /* chip_604x */ 759 .flags = MV_GEN_II_FLAGS, 760 .pio_mask = ATA_PIO4, 761 .udma_mask = ATA_UDMA6, 762 .port_ops = &mv6_ops, 763 }, 764 { /* chip_608x */ 765 .flags = MV_GEN_II_FLAGS | MV_FLAG_DUAL_HC, 766 .pio_mask = ATA_PIO4, 767 .udma_mask = ATA_UDMA6, 768 .port_ops = &mv6_ops, 769 }, 770 { /* chip_6042 */ 771 .flags = MV_GEN_IIE_FLAGS, 772 .pio_mask = ATA_PIO4, 773 .udma_mask = ATA_UDMA6, 774 .port_ops = &mv_iie_ops, 775 }, 776 { /* chip_7042 */ 777 .flags = MV_GEN_IIE_FLAGS, 778 .pio_mask = ATA_PIO4, 779 .udma_mask = ATA_UDMA6, 780 .port_ops = &mv_iie_ops, 781 }, 782 { /* chip_soc */ 783 .flags = MV_GEN_IIE_FLAGS, 784 .pio_mask = ATA_PIO4, 785 .udma_mask = ATA_UDMA6, 786 .port_ops = &mv_iie_ops, 787 }, 788 }; 789 790 static const struct pci_device_id mv_pci_tbl[] = { 791 { PCI_VDEVICE(MARVELL, 0x5040), chip_504x }, 792 { PCI_VDEVICE(MARVELL, 0x5041), chip_504x }, 793 { PCI_VDEVICE(MARVELL, 0x5080), chip_5080 }, 794 { PCI_VDEVICE(MARVELL, 0x5081), chip_508x }, 795 /* RocketRAID 1720/174x have different identifiers */ 796 { PCI_VDEVICE(TTI, 0x1720), chip_6042 }, 797 { PCI_VDEVICE(TTI, 0x1740), chip_6042 }, 798 { PCI_VDEVICE(TTI, 0x1742), chip_6042 }, 799 800 { PCI_VDEVICE(MARVELL, 0x6040), chip_604x }, 801 { PCI_VDEVICE(MARVELL, 0x6041), chip_604x }, 802 { PCI_VDEVICE(MARVELL, 0x6042), chip_6042 }, 803 { PCI_VDEVICE(MARVELL, 0x6080), chip_608x }, 804 { PCI_VDEVICE(MARVELL, 0x6081), chip_608x }, 805 806 { PCI_VDEVICE(ADAPTEC2, 0x0241), chip_604x }, 807 808 /* Adaptec 1430SA */ 809 { PCI_VDEVICE(ADAPTEC2, 0x0243), chip_7042 }, 810 811 /* Marvell 7042 support */ 812 { PCI_VDEVICE(MARVELL, 0x7042), chip_7042 }, 813 814 /* Highpoint RocketRAID PCIe series */ 815 { PCI_VDEVICE(TTI, 0x2300), chip_7042 }, 816 { PCI_VDEVICE(TTI, 0x2310), chip_7042 }, 817 818 { } /* terminate list */ 819 }; 820 821 static const struct mv_hw_ops mv5xxx_ops = { 822 .phy_errata = mv5_phy_errata, 823 .enable_leds = mv5_enable_leds, 824 .read_preamp = mv5_read_preamp, 825 .reset_hc = mv5_reset_hc, 826 .reset_flash = mv5_reset_flash, 827 .reset_bus = mv5_reset_bus, 828 }; 829 830 static const struct mv_hw_ops mv6xxx_ops = { 831 .phy_errata = mv6_phy_errata, 832 .enable_leds = mv6_enable_leds, 833 .read_preamp = mv6_read_preamp, 834 .reset_hc = mv6_reset_hc, 835 .reset_flash = mv6_reset_flash, 836 .reset_bus = mv_reset_pci_bus, 837 }; 838 839 static const struct mv_hw_ops mv_soc_ops = { 840 .phy_errata = mv6_phy_errata, 841 .enable_leds = mv_soc_enable_leds, 842 .read_preamp = mv_soc_read_preamp, 843 .reset_hc = mv_soc_reset_hc, 844 .reset_flash = mv_soc_reset_flash, 845 .reset_bus = mv_soc_reset_bus, 846 }; 847 848 static const struct mv_hw_ops mv_soc_65n_ops = { 849 .phy_errata = mv_soc_65n_phy_errata, 850 .enable_leds = mv_soc_enable_leds, 851 .reset_hc = mv_soc_reset_hc, 852 .reset_flash = mv_soc_reset_flash, 853 .reset_bus = mv_soc_reset_bus, 854 }; 855 856 /* 857 * Functions 858 */ 859 860 static inline void writelfl(unsigned long data, void __iomem *addr) 861 { 862 writel(data, addr); 863 (void) readl(addr); /* flush to avoid PCI posted write */ 864 } 865 866 static inline unsigned int mv_hc_from_port(unsigned int port) 867 { 868 return port >> MV_PORT_HC_SHIFT; 869 } 870 871 static inline unsigned int mv_hardport_from_port(unsigned int port) 872 { 873 return port & MV_PORT_MASK; 874 } 875 876 /* 877 * Consolidate some rather tricky bit shift calculations. 878 * This is hot-path stuff, so not a function. 879 * Simple code, with two return values, so macro rather than inline. 880 * 881 * port is the sole input, in range 0..7. 882 * shift is one output, for use with main_irq_cause / main_irq_mask registers. 883 * hardport is the other output, in range 0..3. 884 * 885 * Note that port and hardport may be the same variable in some cases. 886 */ 887 #define MV_PORT_TO_SHIFT_AND_HARDPORT(port, shift, hardport) \ 888 { \ 889 shift = mv_hc_from_port(port) * HC_SHIFT; \ 890 hardport = mv_hardport_from_port(port); \ 891 shift += hardport * 2; \ 892 } 893 894 static inline void __iomem *mv_hc_base(void __iomem *base, unsigned int hc) 895 { 896 return (base + SATAHC0_REG_BASE + (hc * MV_SATAHC_REG_SZ)); 897 } 898 899 static inline void __iomem *mv_hc_base_from_port(void __iomem *base, 900 unsigned int port) 901 { 902 return mv_hc_base(base, mv_hc_from_port(port)); 903 } 904 905 static inline void __iomem *mv_port_base(void __iomem *base, unsigned int port) 906 { 907 return mv_hc_base_from_port(base, port) + 908 MV_SATAHC_ARBTR_REG_SZ + 909 (mv_hardport_from_port(port) * MV_PORT_REG_SZ); 910 } 911 912 static void __iomem *mv5_phy_base(void __iomem *mmio, unsigned int port) 913 { 914 void __iomem *hc_mmio = mv_hc_base_from_port(mmio, port); 915 unsigned long ofs = (mv_hardport_from_port(port) + 1) * 0x100UL; 916 917 return hc_mmio + ofs; 918 } 919 920 static inline void __iomem *mv_host_base(struct ata_host *host) 921 { 922 struct mv_host_priv *hpriv = host->private_data; 923 return hpriv->base; 924 } 925 926 static inline void __iomem *mv_ap_base(struct ata_port *ap) 927 { 928 return mv_port_base(mv_host_base(ap->host), ap->port_no); 929 } 930 931 static inline int mv_get_hc_count(unsigned long port_flags) 932 { 933 return ((port_flags & MV_FLAG_DUAL_HC) ? 2 : 1); 934 } 935 936 /** 937 * mv_save_cached_regs - (re-)initialize cached port registers 938 * @ap: the port whose registers we are caching 939 * 940 * Initialize the local cache of port registers, 941 * so that reading them over and over again can 942 * be avoided on the hotter paths of this driver. 943 * This saves a few microseconds each time we switch 944 * to/from EDMA mode to perform (eg.) a drive cache flush. 945 */ 946 static void mv_save_cached_regs(struct ata_port *ap) 947 { 948 void __iomem *port_mmio = mv_ap_base(ap); 949 struct mv_port_priv *pp = ap->private_data; 950 951 pp->cached.fiscfg = readl(port_mmio + FISCFG); 952 pp->cached.ltmode = readl(port_mmio + LTMODE); 953 pp->cached.haltcond = readl(port_mmio + EDMA_HALTCOND); 954 pp->cached.unknown_rsvd = readl(port_mmio + EDMA_UNKNOWN_RSVD); 955 } 956 957 /** 958 * mv_write_cached_reg - write to a cached port register 959 * @addr: hardware address of the register 960 * @old: pointer to cached value of the register 961 * @new: new value for the register 962 * 963 * Write a new value to a cached register, 964 * but only if the value is different from before. 965 */ 966 static inline void mv_write_cached_reg(void __iomem *addr, u32 *old, u32 new) 967 { 968 if (new != *old) { 969 unsigned long laddr; 970 *old = new; 971 /* 972 * Workaround for 88SX60x1-B2 FEr SATA#13: 973 * Read-after-write is needed to prevent generating 64-bit 974 * write cycles on the PCI bus for SATA interface registers 975 * at offsets ending in 0x4 or 0xc. 976 * 977 * Looks like a lot of fuss, but it avoids an unnecessary 978 * +1 usec read-after-write delay for unaffected registers. 979 */ 980 laddr = (unsigned long)addr & 0xffff; 981 if (laddr >= 0x300 && laddr <= 0x33c) { 982 laddr &= 0x000f; 983 if (laddr == 0x4 || laddr == 0xc) { 984 writelfl(new, addr); /* read after write */ 985 return; 986 } 987 } 988 writel(new, addr); /* unaffected by the errata */ 989 } 990 } 991 992 static void mv_set_edma_ptrs(void __iomem *port_mmio, 993 struct mv_host_priv *hpriv, 994 struct mv_port_priv *pp) 995 { 996 u32 index; 997 998 /* 999 * initialize request queue 1000 */ 1001 pp->req_idx &= MV_MAX_Q_DEPTH_MASK; /* paranoia */ 1002 index = pp->req_idx << EDMA_REQ_Q_PTR_SHIFT; 1003 1004 WARN_ON(pp->crqb_dma & 0x3ff); 1005 writel((pp->crqb_dma >> 16) >> 16, port_mmio + EDMA_REQ_Q_BASE_HI); 1006 writelfl((pp->crqb_dma & EDMA_REQ_Q_BASE_LO_MASK) | index, 1007 port_mmio + EDMA_REQ_Q_IN_PTR); 1008 writelfl(index, port_mmio + EDMA_REQ_Q_OUT_PTR); 1009 1010 /* 1011 * initialize response queue 1012 */ 1013 pp->resp_idx &= MV_MAX_Q_DEPTH_MASK; /* paranoia */ 1014 index = pp->resp_idx << EDMA_RSP_Q_PTR_SHIFT; 1015 1016 WARN_ON(pp->crpb_dma & 0xff); 1017 writel((pp->crpb_dma >> 16) >> 16, port_mmio + EDMA_RSP_Q_BASE_HI); 1018 writelfl(index, port_mmio + EDMA_RSP_Q_IN_PTR); 1019 writelfl((pp->crpb_dma & EDMA_RSP_Q_BASE_LO_MASK) | index, 1020 port_mmio + EDMA_RSP_Q_OUT_PTR); 1021 } 1022 1023 static void mv_write_main_irq_mask(u32 mask, struct mv_host_priv *hpriv) 1024 { 1025 /* 1026 * When writing to the main_irq_mask in hardware, 1027 * we must ensure exclusivity between the interrupt coalescing bits 1028 * and the corresponding individual port DONE_IRQ bits. 1029 * 1030 * Note that this register is really an "IRQ enable" register, 1031 * not an "IRQ mask" register as Marvell's naming might suggest. 1032 */ 1033 if (mask & (ALL_PORTS_COAL_DONE | PORTS_0_3_COAL_DONE)) 1034 mask &= ~DONE_IRQ_0_3; 1035 if (mask & (ALL_PORTS_COAL_DONE | PORTS_4_7_COAL_DONE)) 1036 mask &= ~DONE_IRQ_4_7; 1037 writelfl(mask, hpriv->main_irq_mask_addr); 1038 } 1039 1040 static void mv_set_main_irq_mask(struct ata_host *host, 1041 u32 disable_bits, u32 enable_bits) 1042 { 1043 struct mv_host_priv *hpriv = host->private_data; 1044 u32 old_mask, new_mask; 1045 1046 old_mask = hpriv->main_irq_mask; 1047 new_mask = (old_mask & ~disable_bits) | enable_bits; 1048 if (new_mask != old_mask) { 1049 hpriv->main_irq_mask = new_mask; 1050 mv_write_main_irq_mask(new_mask, hpriv); 1051 } 1052 } 1053 1054 static void mv_enable_port_irqs(struct ata_port *ap, 1055 unsigned int port_bits) 1056 { 1057 unsigned int shift, hardport, port = ap->port_no; 1058 u32 disable_bits, enable_bits; 1059 1060 MV_PORT_TO_SHIFT_AND_HARDPORT(port, shift, hardport); 1061 1062 disable_bits = (DONE_IRQ | ERR_IRQ) << shift; 1063 enable_bits = port_bits << shift; 1064 mv_set_main_irq_mask(ap->host, disable_bits, enable_bits); 1065 } 1066 1067 static void mv_clear_and_enable_port_irqs(struct ata_port *ap, 1068 void __iomem *port_mmio, 1069 unsigned int port_irqs) 1070 { 1071 struct mv_host_priv *hpriv = ap->host->private_data; 1072 int hardport = mv_hardport_from_port(ap->port_no); 1073 void __iomem *hc_mmio = mv_hc_base_from_port( 1074 mv_host_base(ap->host), ap->port_no); 1075 u32 hc_irq_cause; 1076 1077 /* clear EDMA event indicators, if any */ 1078 writelfl(0, port_mmio + EDMA_ERR_IRQ_CAUSE); 1079 1080 /* clear pending irq events */ 1081 hc_irq_cause = ~((DEV_IRQ | DMA_IRQ) << hardport); 1082 writelfl(hc_irq_cause, hc_mmio + HC_IRQ_CAUSE); 1083 1084 /* clear FIS IRQ Cause */ 1085 if (IS_GEN_IIE(hpriv)) 1086 writelfl(0, port_mmio + FIS_IRQ_CAUSE); 1087 1088 mv_enable_port_irqs(ap, port_irqs); 1089 } 1090 1091 static void mv_set_irq_coalescing(struct ata_host *host, 1092 unsigned int count, unsigned int usecs) 1093 { 1094 struct mv_host_priv *hpriv = host->private_data; 1095 void __iomem *mmio = hpriv->base, *hc_mmio; 1096 u32 coal_enable = 0; 1097 unsigned long flags; 1098 unsigned int clks, is_dual_hc = hpriv->n_ports > MV_PORTS_PER_HC; 1099 const u32 coal_disable = PORTS_0_3_COAL_DONE | PORTS_4_7_COAL_DONE | 1100 ALL_PORTS_COAL_DONE; 1101 1102 /* Disable IRQ coalescing if either threshold is zero */ 1103 if (!usecs || !count) { 1104 clks = count = 0; 1105 } else { 1106 /* Respect maximum limits of the hardware */ 1107 clks = usecs * COAL_CLOCKS_PER_USEC; 1108 if (clks > MAX_COAL_TIME_THRESHOLD) 1109 clks = MAX_COAL_TIME_THRESHOLD; 1110 if (count > MAX_COAL_IO_COUNT) 1111 count = MAX_COAL_IO_COUNT; 1112 } 1113 1114 spin_lock_irqsave(&host->lock, flags); 1115 mv_set_main_irq_mask(host, coal_disable, 0); 1116 1117 if (is_dual_hc && !IS_GEN_I(hpriv)) { 1118 /* 1119 * GEN_II/GEN_IIE with dual host controllers: 1120 * one set of global thresholds for the entire chip. 1121 */ 1122 writel(clks, mmio + IRQ_COAL_TIME_THRESHOLD); 1123 writel(count, mmio + IRQ_COAL_IO_THRESHOLD); 1124 /* clear leftover coal IRQ bit */ 1125 writel(~ALL_PORTS_COAL_IRQ, mmio + IRQ_COAL_CAUSE); 1126 if (count) 1127 coal_enable = ALL_PORTS_COAL_DONE; 1128 clks = count = 0; /* force clearing of regular regs below */ 1129 } 1130 1131 /* 1132 * All chips: independent thresholds for each HC on the chip. 1133 */ 1134 hc_mmio = mv_hc_base_from_port(mmio, 0); 1135 writel(clks, hc_mmio + HC_IRQ_COAL_TIME_THRESHOLD); 1136 writel(count, hc_mmio + HC_IRQ_COAL_IO_THRESHOLD); 1137 writel(~HC_COAL_IRQ, hc_mmio + HC_IRQ_CAUSE); 1138 if (count) 1139 coal_enable |= PORTS_0_3_COAL_DONE; 1140 if (is_dual_hc) { 1141 hc_mmio = mv_hc_base_from_port(mmio, MV_PORTS_PER_HC); 1142 writel(clks, hc_mmio + HC_IRQ_COAL_TIME_THRESHOLD); 1143 writel(count, hc_mmio + HC_IRQ_COAL_IO_THRESHOLD); 1144 writel(~HC_COAL_IRQ, hc_mmio + HC_IRQ_CAUSE); 1145 if (count) 1146 coal_enable |= PORTS_4_7_COAL_DONE; 1147 } 1148 1149 mv_set_main_irq_mask(host, 0, coal_enable); 1150 spin_unlock_irqrestore(&host->lock, flags); 1151 } 1152 1153 /* 1154 * mv_start_edma - Enable eDMA engine 1155 * @pp: port private data 1156 * 1157 * Verify the local cache of the eDMA state is accurate with a 1158 * WARN_ON. 1159 * 1160 * LOCKING: 1161 * Inherited from caller. 1162 */ 1163 static void mv_start_edma(struct ata_port *ap, void __iomem *port_mmio, 1164 struct mv_port_priv *pp, u8 protocol) 1165 { 1166 int want_ncq = (protocol == ATA_PROT_NCQ); 1167 1168 if (pp->pp_flags & MV_PP_FLAG_EDMA_EN) { 1169 int using_ncq = ((pp->pp_flags & MV_PP_FLAG_NCQ_EN) != 0); 1170 if (want_ncq != using_ncq) 1171 mv_stop_edma(ap); 1172 } 1173 if (!(pp->pp_flags & MV_PP_FLAG_EDMA_EN)) { 1174 struct mv_host_priv *hpriv = ap->host->private_data; 1175 1176 mv_edma_cfg(ap, want_ncq, 1); 1177 1178 mv_set_edma_ptrs(port_mmio, hpriv, pp); 1179 mv_clear_and_enable_port_irqs(ap, port_mmio, DONE_IRQ|ERR_IRQ); 1180 1181 writelfl(EDMA_EN, port_mmio + EDMA_CMD); 1182 pp->pp_flags |= MV_PP_FLAG_EDMA_EN; 1183 } 1184 } 1185 1186 static void mv_wait_for_edma_empty_idle(struct ata_port *ap) 1187 { 1188 void __iomem *port_mmio = mv_ap_base(ap); 1189 const u32 empty_idle = (EDMA_STATUS_CACHE_EMPTY | EDMA_STATUS_IDLE); 1190 const int per_loop = 5, timeout = (15 * 1000 / per_loop); 1191 int i; 1192 1193 /* 1194 * Wait for the EDMA engine to finish transactions in progress. 1195 * No idea what a good "timeout" value might be, but measurements 1196 * indicate that it often requires hundreds of microseconds 1197 * with two drives in-use. So we use the 15msec value above 1198 * as a rough guess at what even more drives might require. 1199 */ 1200 for (i = 0; i < timeout; ++i) { 1201 u32 edma_stat = readl(port_mmio + EDMA_STATUS); 1202 if ((edma_stat & empty_idle) == empty_idle) 1203 break; 1204 udelay(per_loop); 1205 } 1206 /* ata_port_info(ap, "%s: %u+ usecs\n", __func__, i); */ 1207 } 1208 1209 /** 1210 * mv_stop_edma_engine - Disable eDMA engine 1211 * @port_mmio: io base address 1212 * 1213 * LOCKING: 1214 * Inherited from caller. 1215 */ 1216 static int mv_stop_edma_engine(void __iomem *port_mmio) 1217 { 1218 int i; 1219 1220 /* Disable eDMA. The disable bit auto clears. */ 1221 writelfl(EDMA_DS, port_mmio + EDMA_CMD); 1222 1223 /* Wait for the chip to confirm eDMA is off. */ 1224 for (i = 10000; i > 0; i--) { 1225 u32 reg = readl(port_mmio + EDMA_CMD); 1226 if (!(reg & EDMA_EN)) 1227 return 0; 1228 udelay(10); 1229 } 1230 return -EIO; 1231 } 1232 1233 static int mv_stop_edma(struct ata_port *ap) 1234 { 1235 void __iomem *port_mmio = mv_ap_base(ap); 1236 struct mv_port_priv *pp = ap->private_data; 1237 int err = 0; 1238 1239 if (!(pp->pp_flags & MV_PP_FLAG_EDMA_EN)) 1240 return 0; 1241 pp->pp_flags &= ~MV_PP_FLAG_EDMA_EN; 1242 mv_wait_for_edma_empty_idle(ap); 1243 if (mv_stop_edma_engine(port_mmio)) { 1244 ata_port_err(ap, "Unable to stop eDMA\n"); 1245 err = -EIO; 1246 } 1247 mv_edma_cfg(ap, 0, 0); 1248 return err; 1249 } 1250 1251 static void mv_dump_mem(struct device *dev, void __iomem *start, unsigned bytes) 1252 { 1253 int b, w, o; 1254 unsigned char linebuf[38]; 1255 1256 for (b = 0; b < bytes; ) { 1257 for (w = 0, o = 0; b < bytes && w < 4; w++) { 1258 o += snprintf(linebuf + o, sizeof(linebuf) - o, 1259 "%08x ", readl(start + b)); 1260 b += sizeof(u32); 1261 } 1262 dev_dbg(dev, "%s: %p: %s\n", 1263 __func__, start + b, linebuf); 1264 } 1265 } 1266 1267 static void mv_dump_pci_cfg(struct pci_dev *pdev, unsigned bytes) 1268 { 1269 int b, w, o; 1270 u32 dw = 0; 1271 unsigned char linebuf[38]; 1272 1273 for (b = 0; b < bytes; ) { 1274 for (w = 0, o = 0; b < bytes && w < 4; w++) { 1275 (void) pci_read_config_dword(pdev, b, &dw); 1276 o += snprintf(linebuf + o, sizeof(linebuf) - o, 1277 "%08x ", dw); 1278 b += sizeof(u32); 1279 } 1280 dev_dbg(&pdev->dev, "%s: %02x: %s\n", 1281 __func__, b, linebuf); 1282 } 1283 } 1284 1285 static void mv_dump_all_regs(void __iomem *mmio_base, 1286 struct pci_dev *pdev) 1287 { 1288 void __iomem *hc_base; 1289 void __iomem *port_base; 1290 int start_port, num_ports, p, start_hc, num_hcs, hc; 1291 1292 start_hc = start_port = 0; 1293 num_ports = 8; /* should be benign for 4 port devs */ 1294 num_hcs = 2; 1295 dev_dbg(&pdev->dev, 1296 "%s: All registers for port(s) %u-%u:\n", __func__, 1297 start_port, num_ports > 1 ? num_ports - 1 : start_port); 1298 1299 dev_dbg(&pdev->dev, "%s: PCI config space regs:\n", __func__); 1300 mv_dump_pci_cfg(pdev, 0x68); 1301 1302 dev_dbg(&pdev->dev, "%s: PCI regs:\n", __func__); 1303 mv_dump_mem(&pdev->dev, mmio_base+0xc00, 0x3c); 1304 mv_dump_mem(&pdev->dev, mmio_base+0xd00, 0x34); 1305 mv_dump_mem(&pdev->dev, mmio_base+0xf00, 0x4); 1306 mv_dump_mem(&pdev->dev, mmio_base+0x1d00, 0x6c); 1307 for (hc = start_hc; hc < start_hc + num_hcs; hc++) { 1308 hc_base = mv_hc_base(mmio_base, hc); 1309 dev_dbg(&pdev->dev, "%s: HC regs (HC %i):\n", __func__, hc); 1310 mv_dump_mem(&pdev->dev, hc_base, 0x1c); 1311 } 1312 for (p = start_port; p < start_port + num_ports; p++) { 1313 port_base = mv_port_base(mmio_base, p); 1314 dev_dbg(&pdev->dev, "%s: EDMA regs (port %i):\n", __func__, p); 1315 mv_dump_mem(&pdev->dev, port_base, 0x54); 1316 dev_dbg(&pdev->dev, "%s: SATA regs (port %i):\n", __func__, p); 1317 mv_dump_mem(&pdev->dev, port_base+0x300, 0x60); 1318 } 1319 } 1320 1321 static unsigned int mv_scr_offset(unsigned int sc_reg_in) 1322 { 1323 unsigned int ofs; 1324 1325 switch (sc_reg_in) { 1326 case SCR_STATUS: 1327 case SCR_CONTROL: 1328 case SCR_ERROR: 1329 ofs = SATA_STATUS + (sc_reg_in * sizeof(u32)); 1330 break; 1331 case SCR_ACTIVE: 1332 ofs = SATA_ACTIVE; /* active is not with the others */ 1333 break; 1334 default: 1335 ofs = 0xffffffffU; 1336 break; 1337 } 1338 return ofs; 1339 } 1340 1341 static int mv_scr_read(struct ata_link *link, unsigned int sc_reg_in, u32 *val) 1342 { 1343 unsigned int ofs = mv_scr_offset(sc_reg_in); 1344 1345 if (ofs != 0xffffffffU) { 1346 *val = readl(mv_ap_base(link->ap) + ofs); 1347 return 0; 1348 } else 1349 return -EINVAL; 1350 } 1351 1352 static int mv_scr_write(struct ata_link *link, unsigned int sc_reg_in, u32 val) 1353 { 1354 unsigned int ofs = mv_scr_offset(sc_reg_in); 1355 1356 if (ofs != 0xffffffffU) { 1357 void __iomem *addr = mv_ap_base(link->ap) + ofs; 1358 struct mv_host_priv *hpriv = link->ap->host->private_data; 1359 if (sc_reg_in == SCR_CONTROL) { 1360 /* 1361 * Workaround for 88SX60x1 FEr SATA#26: 1362 * 1363 * COMRESETs have to take care not to accidentally 1364 * put the drive to sleep when writing SCR_CONTROL. 1365 * Setting bits 12..15 prevents this problem. 1366 * 1367 * So if we see an outbound COMMRESET, set those bits. 1368 * Ditto for the followup write that clears the reset. 1369 * 1370 * The proprietary driver does this for 1371 * all chip versions, and so do we. 1372 */ 1373 if ((val & 0xf) == 1 || (readl(addr) & 0xf) == 1) 1374 val |= 0xf000; 1375 1376 if (hpriv->hp_flags & MV_HP_FIX_LP_PHY_CTL) { 1377 void __iomem *lp_phy_addr = 1378 mv_ap_base(link->ap) + LP_PHY_CTL; 1379 /* 1380 * Set PHY speed according to SControl speed. 1381 */ 1382 u32 lp_phy_val = 1383 LP_PHY_CTL_PIN_PU_PLL | 1384 LP_PHY_CTL_PIN_PU_RX | 1385 LP_PHY_CTL_PIN_PU_TX; 1386 1387 if ((val & 0xf0) != 0x10) 1388 lp_phy_val |= 1389 LP_PHY_CTL_GEN_TX_3G | 1390 LP_PHY_CTL_GEN_RX_3G; 1391 1392 writelfl(lp_phy_val, lp_phy_addr); 1393 } 1394 } 1395 writelfl(val, addr); 1396 return 0; 1397 } else 1398 return -EINVAL; 1399 } 1400 1401 static void mv6_dev_config(struct ata_device *adev) 1402 { 1403 /* 1404 * Deal with Gen-II ("mv6") hardware quirks/restrictions: 1405 * 1406 * Gen-II does not support NCQ over a port multiplier 1407 * (no FIS-based switching). 1408 */ 1409 if (adev->flags & ATA_DFLAG_NCQ) { 1410 if (sata_pmp_attached(adev->link->ap)) { 1411 adev->flags &= ~ATA_DFLAG_NCQ; 1412 ata_dev_info(adev, 1413 "NCQ disabled for command-based switching\n"); 1414 } 1415 } 1416 } 1417 1418 static int mv_qc_defer(struct ata_queued_cmd *qc) 1419 { 1420 struct ata_link *link = qc->dev->link; 1421 struct ata_port *ap = link->ap; 1422 struct mv_port_priv *pp = ap->private_data; 1423 1424 /* 1425 * Don't allow new commands if we're in a delayed EH state 1426 * for NCQ and/or FIS-based switching. 1427 */ 1428 if (pp->pp_flags & MV_PP_FLAG_DELAYED_EH) 1429 return ATA_DEFER_PORT; 1430 1431 /* PIO commands need exclusive link: no other commands [DMA or PIO] 1432 * can run concurrently. 1433 * set excl_link when we want to send a PIO command in DMA mode 1434 * or a non-NCQ command in NCQ mode. 1435 * When we receive a command from that link, and there are no 1436 * outstanding commands, mark a flag to clear excl_link and let 1437 * the command go through. 1438 */ 1439 if (unlikely(ap->excl_link)) { 1440 if (link == ap->excl_link) { 1441 if (ap->nr_active_links) 1442 return ATA_DEFER_PORT; 1443 qc->flags |= ATA_QCFLAG_CLEAR_EXCL; 1444 return 0; 1445 } else 1446 return ATA_DEFER_PORT; 1447 } 1448 1449 /* 1450 * If the port is completely idle, then allow the new qc. 1451 */ 1452 if (ap->nr_active_links == 0) 1453 return 0; 1454 1455 /* 1456 * The port is operating in host queuing mode (EDMA) with NCQ 1457 * enabled, allow multiple NCQ commands. EDMA also allows 1458 * queueing multiple DMA commands but libata core currently 1459 * doesn't allow it. 1460 */ 1461 if ((pp->pp_flags & MV_PP_FLAG_EDMA_EN) && 1462 (pp->pp_flags & MV_PP_FLAG_NCQ_EN)) { 1463 if (ata_is_ncq(qc->tf.protocol)) 1464 return 0; 1465 else { 1466 ap->excl_link = link; 1467 return ATA_DEFER_PORT; 1468 } 1469 } 1470 1471 return ATA_DEFER_PORT; 1472 } 1473 1474 static void mv_config_fbs(struct ata_port *ap, int want_ncq, int want_fbs) 1475 { 1476 struct mv_port_priv *pp = ap->private_data; 1477 void __iomem *port_mmio; 1478 1479 u32 fiscfg, *old_fiscfg = &pp->cached.fiscfg; 1480 u32 ltmode, *old_ltmode = &pp->cached.ltmode; 1481 u32 haltcond, *old_haltcond = &pp->cached.haltcond; 1482 1483 ltmode = *old_ltmode & ~LTMODE_BIT8; 1484 haltcond = *old_haltcond | EDMA_ERR_DEV; 1485 1486 if (want_fbs) { 1487 fiscfg = *old_fiscfg | FISCFG_SINGLE_SYNC; 1488 ltmode = *old_ltmode | LTMODE_BIT8; 1489 if (want_ncq) 1490 haltcond &= ~EDMA_ERR_DEV; 1491 else 1492 fiscfg |= FISCFG_WAIT_DEV_ERR; 1493 } else { 1494 fiscfg = *old_fiscfg & ~(FISCFG_SINGLE_SYNC | FISCFG_WAIT_DEV_ERR); 1495 } 1496 1497 port_mmio = mv_ap_base(ap); 1498 mv_write_cached_reg(port_mmio + FISCFG, old_fiscfg, fiscfg); 1499 mv_write_cached_reg(port_mmio + LTMODE, old_ltmode, ltmode); 1500 mv_write_cached_reg(port_mmio + EDMA_HALTCOND, old_haltcond, haltcond); 1501 } 1502 1503 static void mv_60x1_errata_sata25(struct ata_port *ap, int want_ncq) 1504 { 1505 struct mv_host_priv *hpriv = ap->host->private_data; 1506 u32 old, new; 1507 1508 /* workaround for 88SX60x1 FEr SATA#25 (part 1) */ 1509 old = readl(hpriv->base + GPIO_PORT_CTL); 1510 if (want_ncq) 1511 new = old | (1 << 22); 1512 else 1513 new = old & ~(1 << 22); 1514 if (new != old) 1515 writel(new, hpriv->base + GPIO_PORT_CTL); 1516 } 1517 1518 /* 1519 * mv_bmdma_enable - set a magic bit on GEN_IIE to allow bmdma 1520 * @ap: Port being initialized 1521 * 1522 * There are two DMA modes on these chips: basic DMA, and EDMA. 1523 * 1524 * Bit-0 of the "EDMA RESERVED" register enables/disables use 1525 * of basic DMA on the GEN_IIE versions of the chips. 1526 * 1527 * This bit survives EDMA resets, and must be set for basic DMA 1528 * to function, and should be cleared when EDMA is active. 1529 */ 1530 static void mv_bmdma_enable_iie(struct ata_port *ap, int enable_bmdma) 1531 { 1532 struct mv_port_priv *pp = ap->private_data; 1533 u32 new, *old = &pp->cached.unknown_rsvd; 1534 1535 if (enable_bmdma) 1536 new = *old | 1; 1537 else 1538 new = *old & ~1; 1539 mv_write_cached_reg(mv_ap_base(ap) + EDMA_UNKNOWN_RSVD, old, new); 1540 } 1541 1542 /* 1543 * SOC chips have an issue whereby the HDD LEDs don't always blink 1544 * during I/O when NCQ is enabled. Enabling a special "LED blink" mode 1545 * of the SOC takes care of it, generating a steady blink rate when 1546 * any drive on the chip is active. 1547 * 1548 * Unfortunately, the blink mode is a global hardware setting for the SOC, 1549 * so we must use it whenever at least one port on the SOC has NCQ enabled. 1550 * 1551 * We turn "LED blink" off when NCQ is not in use anywhere, because the normal 1552 * LED operation works then, and provides better (more accurate) feedback. 1553 * 1554 * Note that this code assumes that an SOC never has more than one HC onboard. 1555 */ 1556 static void mv_soc_led_blink_enable(struct ata_port *ap) 1557 { 1558 struct ata_host *host = ap->host; 1559 struct mv_host_priv *hpriv = host->private_data; 1560 void __iomem *hc_mmio; 1561 u32 led_ctrl; 1562 1563 if (hpriv->hp_flags & MV_HP_QUIRK_LED_BLINK_EN) 1564 return; 1565 hpriv->hp_flags |= MV_HP_QUIRK_LED_BLINK_EN; 1566 hc_mmio = mv_hc_base_from_port(mv_host_base(host), ap->port_no); 1567 led_ctrl = readl(hc_mmio + SOC_LED_CTRL); 1568 writel(led_ctrl | SOC_LED_CTRL_BLINK, hc_mmio + SOC_LED_CTRL); 1569 } 1570 1571 static void mv_soc_led_blink_disable(struct ata_port *ap) 1572 { 1573 struct ata_host *host = ap->host; 1574 struct mv_host_priv *hpriv = host->private_data; 1575 void __iomem *hc_mmio; 1576 u32 led_ctrl; 1577 unsigned int port; 1578 1579 if (!(hpriv->hp_flags & MV_HP_QUIRK_LED_BLINK_EN)) 1580 return; 1581 1582 /* disable led-blink only if no ports are using NCQ */ 1583 for (port = 0; port < hpriv->n_ports; port++) { 1584 struct ata_port *this_ap = host->ports[port]; 1585 struct mv_port_priv *pp = this_ap->private_data; 1586 1587 if (pp->pp_flags & MV_PP_FLAG_NCQ_EN) 1588 return; 1589 } 1590 1591 hpriv->hp_flags &= ~MV_HP_QUIRK_LED_BLINK_EN; 1592 hc_mmio = mv_hc_base_from_port(mv_host_base(host), ap->port_no); 1593 led_ctrl = readl(hc_mmio + SOC_LED_CTRL); 1594 writel(led_ctrl & ~SOC_LED_CTRL_BLINK, hc_mmio + SOC_LED_CTRL); 1595 } 1596 1597 static void mv_edma_cfg(struct ata_port *ap, int want_ncq, int want_edma) 1598 { 1599 u32 cfg; 1600 struct mv_port_priv *pp = ap->private_data; 1601 struct mv_host_priv *hpriv = ap->host->private_data; 1602 void __iomem *port_mmio = mv_ap_base(ap); 1603 1604 /* set up non-NCQ EDMA configuration */ 1605 cfg = EDMA_CFG_Q_DEPTH; /* always 0x1f for *all* chips */ 1606 pp->pp_flags &= 1607 ~(MV_PP_FLAG_FBS_EN | MV_PP_FLAG_NCQ_EN | MV_PP_FLAG_FAKE_ATA_BUSY); 1608 1609 if (IS_GEN_I(hpriv)) 1610 cfg |= (1 << 8); /* enab config burst size mask */ 1611 1612 else if (IS_GEN_II(hpriv)) { 1613 cfg |= EDMA_CFG_RD_BRST_EXT | EDMA_CFG_WR_BUFF_LEN; 1614 mv_60x1_errata_sata25(ap, want_ncq); 1615 1616 } else if (IS_GEN_IIE(hpriv)) { 1617 int want_fbs = sata_pmp_attached(ap); 1618 /* 1619 * Possible future enhancement: 1620 * 1621 * The chip can use FBS with non-NCQ, if we allow it, 1622 * But first we need to have the error handling in place 1623 * for this mode (datasheet section 7.3.15.4.2.3). 1624 * So disallow non-NCQ FBS for now. 1625 */ 1626 want_fbs &= want_ncq; 1627 1628 mv_config_fbs(ap, want_ncq, want_fbs); 1629 1630 if (want_fbs) { 1631 pp->pp_flags |= MV_PP_FLAG_FBS_EN; 1632 cfg |= EDMA_CFG_EDMA_FBS; /* FIS-based switching */ 1633 } 1634 1635 cfg |= (1 << 23); /* do not mask PM field in rx'd FIS */ 1636 if (want_edma) { 1637 cfg |= (1 << 22); /* enab 4-entry host queue cache */ 1638 if (!IS_SOC(hpriv)) 1639 cfg |= (1 << 18); /* enab early completion */ 1640 } 1641 if (hpriv->hp_flags & MV_HP_CUT_THROUGH) 1642 cfg |= (1 << 17); /* enab cut-thru (dis stor&forwrd) */ 1643 mv_bmdma_enable_iie(ap, !want_edma); 1644 1645 if (IS_SOC(hpriv)) { 1646 if (want_ncq) 1647 mv_soc_led_blink_enable(ap); 1648 else 1649 mv_soc_led_blink_disable(ap); 1650 } 1651 } 1652 1653 if (want_ncq) { 1654 cfg |= EDMA_CFG_NCQ; 1655 pp->pp_flags |= MV_PP_FLAG_NCQ_EN; 1656 } 1657 1658 writelfl(cfg, port_mmio + EDMA_CFG); 1659 } 1660 1661 static void mv_port_free_dma_mem(struct ata_port *ap) 1662 { 1663 struct mv_host_priv *hpriv = ap->host->private_data; 1664 struct mv_port_priv *pp = ap->private_data; 1665 int tag; 1666 1667 if (pp->crqb) { 1668 dma_pool_free(hpriv->crqb_pool, pp->crqb, pp->crqb_dma); 1669 pp->crqb = NULL; 1670 } 1671 if (pp->crpb) { 1672 dma_pool_free(hpriv->crpb_pool, pp->crpb, pp->crpb_dma); 1673 pp->crpb = NULL; 1674 } 1675 /* 1676 * For GEN_I, there's no NCQ, so we have only a single sg_tbl. 1677 * For later hardware, we have one unique sg_tbl per NCQ tag. 1678 */ 1679 for (tag = 0; tag < MV_MAX_Q_DEPTH; ++tag) { 1680 if (pp->sg_tbl[tag]) { 1681 if (tag == 0 || !IS_GEN_I(hpriv)) 1682 dma_pool_free(hpriv->sg_tbl_pool, 1683 pp->sg_tbl[tag], 1684 pp->sg_tbl_dma[tag]); 1685 pp->sg_tbl[tag] = NULL; 1686 } 1687 } 1688 } 1689 1690 /** 1691 * mv_port_start - Port specific init/start routine. 1692 * @ap: ATA channel to manipulate 1693 * 1694 * Allocate and point to DMA memory, init port private memory, 1695 * zero indices. 1696 * 1697 * LOCKING: 1698 * Inherited from caller. 1699 */ 1700 static int mv_port_start(struct ata_port *ap) 1701 { 1702 struct device *dev = ap->host->dev; 1703 struct mv_host_priv *hpriv = ap->host->private_data; 1704 struct mv_port_priv *pp; 1705 unsigned long flags; 1706 int tag; 1707 1708 pp = devm_kzalloc(dev, sizeof(*pp), GFP_KERNEL); 1709 if (!pp) 1710 return -ENOMEM; 1711 ap->private_data = pp; 1712 1713 pp->crqb = dma_pool_zalloc(hpriv->crqb_pool, GFP_KERNEL, &pp->crqb_dma); 1714 if (!pp->crqb) 1715 return -ENOMEM; 1716 1717 pp->crpb = dma_pool_zalloc(hpriv->crpb_pool, GFP_KERNEL, &pp->crpb_dma); 1718 if (!pp->crpb) 1719 goto out_port_free_dma_mem; 1720 1721 /* 6041/6081 Rev. "C0" (and newer) are okay with async notify */ 1722 if (hpriv->hp_flags & MV_HP_ERRATA_60X1C0) 1723 ap->flags |= ATA_FLAG_AN; 1724 /* 1725 * For GEN_I, there's no NCQ, so we only allocate a single sg_tbl. 1726 * For later hardware, we need one unique sg_tbl per NCQ tag. 1727 */ 1728 for (tag = 0; tag < MV_MAX_Q_DEPTH; ++tag) { 1729 if (tag == 0 || !IS_GEN_I(hpriv)) { 1730 pp->sg_tbl[tag] = dma_pool_alloc(hpriv->sg_tbl_pool, 1731 GFP_KERNEL, &pp->sg_tbl_dma[tag]); 1732 if (!pp->sg_tbl[tag]) 1733 goto out_port_free_dma_mem; 1734 } else { 1735 pp->sg_tbl[tag] = pp->sg_tbl[0]; 1736 pp->sg_tbl_dma[tag] = pp->sg_tbl_dma[0]; 1737 } 1738 } 1739 1740 spin_lock_irqsave(ap->lock, flags); 1741 mv_save_cached_regs(ap); 1742 mv_edma_cfg(ap, 0, 0); 1743 spin_unlock_irqrestore(ap->lock, flags); 1744 1745 return 0; 1746 1747 out_port_free_dma_mem: 1748 mv_port_free_dma_mem(ap); 1749 return -ENOMEM; 1750 } 1751 1752 /** 1753 * mv_port_stop - Port specific cleanup/stop routine. 1754 * @ap: ATA channel to manipulate 1755 * 1756 * Stop DMA, cleanup port memory. 1757 * 1758 * LOCKING: 1759 * This routine uses the host lock to protect the DMA stop. 1760 */ 1761 static void mv_port_stop(struct ata_port *ap) 1762 { 1763 unsigned long flags; 1764 1765 spin_lock_irqsave(ap->lock, flags); 1766 mv_stop_edma(ap); 1767 mv_enable_port_irqs(ap, 0); 1768 spin_unlock_irqrestore(ap->lock, flags); 1769 mv_port_free_dma_mem(ap); 1770 } 1771 1772 /** 1773 * mv_fill_sg - Fill out the Marvell ePRD (scatter gather) entries 1774 * @qc: queued command whose SG list to source from 1775 * 1776 * Populate the SG list and mark the last entry. 1777 * 1778 * LOCKING: 1779 * Inherited from caller. 1780 */ 1781 static void mv_fill_sg(struct ata_queued_cmd *qc) 1782 { 1783 struct mv_port_priv *pp = qc->ap->private_data; 1784 struct scatterlist *sg; 1785 struct mv_sg *mv_sg, *last_sg = NULL; 1786 unsigned int si; 1787 1788 mv_sg = pp->sg_tbl[qc->hw_tag]; 1789 for_each_sg(qc->sg, sg, qc->n_elem, si) { 1790 dma_addr_t addr = sg_dma_address(sg); 1791 u32 sg_len = sg_dma_len(sg); 1792 1793 while (sg_len) { 1794 u32 offset = addr & 0xffff; 1795 u32 len = sg_len; 1796 1797 if (offset + len > 0x10000) 1798 len = 0x10000 - offset; 1799 1800 mv_sg->addr = cpu_to_le32(addr & 0xffffffff); 1801 mv_sg->addr_hi = cpu_to_le32((addr >> 16) >> 16); 1802 mv_sg->flags_size = cpu_to_le32(len & 0xffff); 1803 mv_sg->reserved = 0; 1804 1805 sg_len -= len; 1806 addr += len; 1807 1808 last_sg = mv_sg; 1809 mv_sg++; 1810 } 1811 } 1812 1813 if (likely(last_sg)) 1814 last_sg->flags_size |= cpu_to_le32(EPRD_FLAG_END_OF_TBL); 1815 mb(); /* ensure data structure is visible to the chipset */ 1816 } 1817 1818 static void mv_crqb_pack_cmd(__le16 *cmdw, u8 data, u8 addr, unsigned last) 1819 { 1820 u16 tmp = data | (addr << CRQB_CMD_ADDR_SHIFT) | CRQB_CMD_CS | 1821 (last ? CRQB_CMD_LAST : 0); 1822 *cmdw = cpu_to_le16(tmp); 1823 } 1824 1825 /** 1826 * mv_sff_irq_clear - Clear hardware interrupt after DMA. 1827 * @ap: Port associated with this ATA transaction. 1828 * 1829 * We need this only for ATAPI bmdma transactions, 1830 * as otherwise we experience spurious interrupts 1831 * after libata-sff handles the bmdma interrupts. 1832 */ 1833 static void mv_sff_irq_clear(struct ata_port *ap) 1834 { 1835 mv_clear_and_enable_port_irqs(ap, mv_ap_base(ap), ERR_IRQ); 1836 } 1837 1838 /** 1839 * mv_check_atapi_dma - Filter ATAPI cmds which are unsuitable for DMA. 1840 * @qc: queued command to check for chipset/DMA compatibility. 1841 * 1842 * The bmdma engines cannot handle speculative data sizes 1843 * (bytecount under/over flow). So only allow DMA for 1844 * data transfer commands with known data sizes. 1845 * 1846 * LOCKING: 1847 * Inherited from caller. 1848 */ 1849 static int mv_check_atapi_dma(struct ata_queued_cmd *qc) 1850 { 1851 struct scsi_cmnd *scmd = qc->scsicmd; 1852 1853 if (scmd) { 1854 switch (scmd->cmnd[0]) { 1855 case READ_6: 1856 case READ_10: 1857 case READ_12: 1858 case WRITE_6: 1859 case WRITE_10: 1860 case WRITE_12: 1861 case GPCMD_READ_CD: 1862 case GPCMD_SEND_DVD_STRUCTURE: 1863 case GPCMD_SEND_CUE_SHEET: 1864 return 0; /* DMA is safe */ 1865 } 1866 } 1867 return -EOPNOTSUPP; /* use PIO instead */ 1868 } 1869 1870 /** 1871 * mv_bmdma_setup - Set up BMDMA transaction 1872 * @qc: queued command to prepare DMA for. 1873 * 1874 * LOCKING: 1875 * Inherited from caller. 1876 */ 1877 static void mv_bmdma_setup(struct ata_queued_cmd *qc) 1878 { 1879 struct ata_port *ap = qc->ap; 1880 void __iomem *port_mmio = mv_ap_base(ap); 1881 struct mv_port_priv *pp = ap->private_data; 1882 1883 mv_fill_sg(qc); 1884 1885 /* clear all DMA cmd bits */ 1886 writel(0, port_mmio + BMDMA_CMD); 1887 1888 /* load PRD table addr. */ 1889 writel((pp->sg_tbl_dma[qc->hw_tag] >> 16) >> 16, 1890 port_mmio + BMDMA_PRD_HIGH); 1891 writelfl(pp->sg_tbl_dma[qc->hw_tag], 1892 port_mmio + BMDMA_PRD_LOW); 1893 1894 /* issue r/w command */ 1895 ap->ops->sff_exec_command(ap, &qc->tf); 1896 } 1897 1898 /** 1899 * mv_bmdma_start - Start a BMDMA transaction 1900 * @qc: queued command to start DMA on. 1901 * 1902 * LOCKING: 1903 * Inherited from caller. 1904 */ 1905 static void mv_bmdma_start(struct ata_queued_cmd *qc) 1906 { 1907 struct ata_port *ap = qc->ap; 1908 void __iomem *port_mmio = mv_ap_base(ap); 1909 unsigned int rw = (qc->tf.flags & ATA_TFLAG_WRITE); 1910 u32 cmd = (rw ? 0 : ATA_DMA_WR) | ATA_DMA_START; 1911 1912 /* start host DMA transaction */ 1913 writelfl(cmd, port_mmio + BMDMA_CMD); 1914 } 1915 1916 /** 1917 * mv_bmdma_stop_ap - Stop BMDMA transfer 1918 * @ap: port to stop 1919 * 1920 * Clears the ATA_DMA_START flag in the bmdma control register 1921 * 1922 * LOCKING: 1923 * Inherited from caller. 1924 */ 1925 static void mv_bmdma_stop_ap(struct ata_port *ap) 1926 { 1927 void __iomem *port_mmio = mv_ap_base(ap); 1928 u32 cmd; 1929 1930 /* clear start/stop bit */ 1931 cmd = readl(port_mmio + BMDMA_CMD); 1932 if (cmd & ATA_DMA_START) { 1933 cmd &= ~ATA_DMA_START; 1934 writelfl(cmd, port_mmio + BMDMA_CMD); 1935 1936 /* one-PIO-cycle guaranteed wait, per spec, for HDMA1:0 transition */ 1937 ata_sff_dma_pause(ap); 1938 } 1939 } 1940 1941 static void mv_bmdma_stop(struct ata_queued_cmd *qc) 1942 { 1943 mv_bmdma_stop_ap(qc->ap); 1944 } 1945 1946 /** 1947 * mv_bmdma_status - Read BMDMA status 1948 * @ap: port for which to retrieve DMA status. 1949 * 1950 * Read and return equivalent of the sff BMDMA status register. 1951 * 1952 * LOCKING: 1953 * Inherited from caller. 1954 */ 1955 static u8 mv_bmdma_status(struct ata_port *ap) 1956 { 1957 void __iomem *port_mmio = mv_ap_base(ap); 1958 u32 reg, status; 1959 1960 /* 1961 * Other bits are valid only if ATA_DMA_ACTIVE==0, 1962 * and the ATA_DMA_INTR bit doesn't exist. 1963 */ 1964 reg = readl(port_mmio + BMDMA_STATUS); 1965 if (reg & ATA_DMA_ACTIVE) 1966 status = ATA_DMA_ACTIVE; 1967 else if (reg & ATA_DMA_ERR) 1968 status = (reg & ATA_DMA_ERR) | ATA_DMA_INTR; 1969 else { 1970 /* 1971 * Just because DMA_ACTIVE is 0 (DMA completed), 1972 * this does _not_ mean the device is "done". 1973 * So we should not yet be signalling ATA_DMA_INTR 1974 * in some cases. Eg. DSM/TRIM, and perhaps others. 1975 */ 1976 mv_bmdma_stop_ap(ap); 1977 if (ioread8(ap->ioaddr.altstatus_addr) & ATA_BUSY) 1978 status = 0; 1979 else 1980 status = ATA_DMA_INTR; 1981 } 1982 return status; 1983 } 1984 1985 static void mv_rw_multi_errata_sata24(struct ata_queued_cmd *qc) 1986 { 1987 struct ata_taskfile *tf = &qc->tf; 1988 /* 1989 * Workaround for 88SX60x1 FEr SATA#24. 1990 * 1991 * Chip may corrupt WRITEs if multi_count >= 4kB. 1992 * Note that READs are unaffected. 1993 * 1994 * It's not clear if this errata really means "4K bytes", 1995 * or if it always happens for multi_count > 7 1996 * regardless of device sector_size. 1997 * 1998 * So, for safety, any write with multi_count > 7 1999 * gets converted here into a regular PIO write instead: 2000 */ 2001 if ((tf->flags & ATA_TFLAG_WRITE) && is_multi_taskfile(tf)) { 2002 if (qc->dev->multi_count > 7) { 2003 switch (tf->command) { 2004 case ATA_CMD_WRITE_MULTI: 2005 tf->command = ATA_CMD_PIO_WRITE; 2006 break; 2007 case ATA_CMD_WRITE_MULTI_FUA_EXT: 2008 tf->flags &= ~ATA_TFLAG_FUA; /* ugh */ 2009 fallthrough; 2010 case ATA_CMD_WRITE_MULTI_EXT: 2011 tf->command = ATA_CMD_PIO_WRITE_EXT; 2012 break; 2013 } 2014 } 2015 } 2016 } 2017 2018 /** 2019 * mv_qc_prep - Host specific command preparation. 2020 * @qc: queued command to prepare 2021 * 2022 * This routine simply redirects to the general purpose routine 2023 * if command is not DMA. Else, it handles prep of the CRQB 2024 * (command request block), does some sanity checking, and calls 2025 * the SG load routine. 2026 * 2027 * LOCKING: 2028 * Inherited from caller. 2029 */ 2030 static enum ata_completion_errors mv_qc_prep(struct ata_queued_cmd *qc) 2031 { 2032 struct ata_port *ap = qc->ap; 2033 struct mv_port_priv *pp = ap->private_data; 2034 __le16 *cw; 2035 struct ata_taskfile *tf = &qc->tf; 2036 u16 flags = 0; 2037 unsigned in_index; 2038 2039 switch (tf->protocol) { 2040 case ATA_PROT_DMA: 2041 if (tf->command == ATA_CMD_DSM) 2042 return AC_ERR_OK; 2043 fallthrough; 2044 case ATA_PROT_NCQ: 2045 break; /* continue below */ 2046 case ATA_PROT_PIO: 2047 mv_rw_multi_errata_sata24(qc); 2048 return AC_ERR_OK; 2049 default: 2050 return AC_ERR_OK; 2051 } 2052 2053 /* Fill in command request block 2054 */ 2055 if (!(tf->flags & ATA_TFLAG_WRITE)) 2056 flags |= CRQB_FLAG_READ; 2057 WARN_ON(MV_MAX_Q_DEPTH <= qc->hw_tag); 2058 flags |= qc->hw_tag << CRQB_TAG_SHIFT; 2059 flags |= (qc->dev->link->pmp & 0xf) << CRQB_PMP_SHIFT; 2060 2061 /* get current queue index from software */ 2062 in_index = pp->req_idx; 2063 2064 pp->crqb[in_index].sg_addr = 2065 cpu_to_le32(pp->sg_tbl_dma[qc->hw_tag] & 0xffffffff); 2066 pp->crqb[in_index].sg_addr_hi = 2067 cpu_to_le32((pp->sg_tbl_dma[qc->hw_tag] >> 16) >> 16); 2068 pp->crqb[in_index].ctrl_flags = cpu_to_le16(flags); 2069 2070 cw = &pp->crqb[in_index].ata_cmd[0]; 2071 2072 /* Sadly, the CRQB cannot accommodate all registers--there are 2073 * only 11 bytes...so we must pick and choose required 2074 * registers based on the command. So, we drop feature and 2075 * hob_feature for [RW] DMA commands, but they are needed for 2076 * NCQ. NCQ will drop hob_nsect, which is not needed there 2077 * (nsect is used only for the tag; feat/hob_feat hold true nsect). 2078 */ 2079 switch (tf->command) { 2080 case ATA_CMD_READ: 2081 case ATA_CMD_READ_EXT: 2082 case ATA_CMD_WRITE: 2083 case ATA_CMD_WRITE_EXT: 2084 case ATA_CMD_WRITE_FUA_EXT: 2085 mv_crqb_pack_cmd(cw++, tf->hob_nsect, ATA_REG_NSECT, 0); 2086 break; 2087 case ATA_CMD_FPDMA_READ: 2088 case ATA_CMD_FPDMA_WRITE: 2089 mv_crqb_pack_cmd(cw++, tf->hob_feature, ATA_REG_FEATURE, 0); 2090 mv_crqb_pack_cmd(cw++, tf->feature, ATA_REG_FEATURE, 0); 2091 break; 2092 default: 2093 /* The only other commands EDMA supports in non-queued and 2094 * non-NCQ mode are: [RW] STREAM DMA and W DMA FUA EXT, none 2095 * of which are defined/used by Linux. If we get here, this 2096 * driver needs work. 2097 */ 2098 ata_port_err(ap, "%s: unsupported command: %.2x\n", __func__, 2099 tf->command); 2100 return AC_ERR_INVALID; 2101 } 2102 mv_crqb_pack_cmd(cw++, tf->nsect, ATA_REG_NSECT, 0); 2103 mv_crqb_pack_cmd(cw++, tf->hob_lbal, ATA_REG_LBAL, 0); 2104 mv_crqb_pack_cmd(cw++, tf->lbal, ATA_REG_LBAL, 0); 2105 mv_crqb_pack_cmd(cw++, tf->hob_lbam, ATA_REG_LBAM, 0); 2106 mv_crqb_pack_cmd(cw++, tf->lbam, ATA_REG_LBAM, 0); 2107 mv_crqb_pack_cmd(cw++, tf->hob_lbah, ATA_REG_LBAH, 0); 2108 mv_crqb_pack_cmd(cw++, tf->lbah, ATA_REG_LBAH, 0); 2109 mv_crqb_pack_cmd(cw++, tf->device, ATA_REG_DEVICE, 0); 2110 mv_crqb_pack_cmd(cw++, tf->command, ATA_REG_CMD, 1); /* last */ 2111 2112 if (!(qc->flags & ATA_QCFLAG_DMAMAP)) 2113 return AC_ERR_OK; 2114 mv_fill_sg(qc); 2115 2116 return AC_ERR_OK; 2117 } 2118 2119 /** 2120 * mv_qc_prep_iie - Host specific command preparation. 2121 * @qc: queued command to prepare 2122 * 2123 * This routine simply redirects to the general purpose routine 2124 * if command is not DMA. Else, it handles prep of the CRQB 2125 * (command request block), does some sanity checking, and calls 2126 * the SG load routine. 2127 * 2128 * LOCKING: 2129 * Inherited from caller. 2130 */ 2131 static enum ata_completion_errors mv_qc_prep_iie(struct ata_queued_cmd *qc) 2132 { 2133 struct ata_port *ap = qc->ap; 2134 struct mv_port_priv *pp = ap->private_data; 2135 struct mv_crqb_iie *crqb; 2136 struct ata_taskfile *tf = &qc->tf; 2137 unsigned in_index; 2138 u32 flags = 0; 2139 2140 if ((tf->protocol != ATA_PROT_DMA) && 2141 (tf->protocol != ATA_PROT_NCQ)) 2142 return AC_ERR_OK; 2143 if (tf->command == ATA_CMD_DSM) 2144 return AC_ERR_OK; /* use bmdma for this */ 2145 2146 /* Fill in Gen IIE command request block */ 2147 if (!(tf->flags & ATA_TFLAG_WRITE)) 2148 flags |= CRQB_FLAG_READ; 2149 2150 WARN_ON(MV_MAX_Q_DEPTH <= qc->hw_tag); 2151 flags |= qc->hw_tag << CRQB_TAG_SHIFT; 2152 flags |= qc->hw_tag << CRQB_HOSTQ_SHIFT; 2153 flags |= (qc->dev->link->pmp & 0xf) << CRQB_PMP_SHIFT; 2154 2155 /* get current queue index from software */ 2156 in_index = pp->req_idx; 2157 2158 crqb = (struct mv_crqb_iie *) &pp->crqb[in_index]; 2159 crqb->addr = cpu_to_le32(pp->sg_tbl_dma[qc->hw_tag] & 0xffffffff); 2160 crqb->addr_hi = cpu_to_le32((pp->sg_tbl_dma[qc->hw_tag] >> 16) >> 16); 2161 crqb->flags = cpu_to_le32(flags); 2162 2163 crqb->ata_cmd[0] = cpu_to_le32( 2164 (tf->command << 16) | 2165 (tf->feature << 24) 2166 ); 2167 crqb->ata_cmd[1] = cpu_to_le32( 2168 (tf->lbal << 0) | 2169 (tf->lbam << 8) | 2170 (tf->lbah << 16) | 2171 (tf->device << 24) 2172 ); 2173 crqb->ata_cmd[2] = cpu_to_le32( 2174 (tf->hob_lbal << 0) | 2175 (tf->hob_lbam << 8) | 2176 (tf->hob_lbah << 16) | 2177 (tf->hob_feature << 24) 2178 ); 2179 crqb->ata_cmd[3] = cpu_to_le32( 2180 (tf->nsect << 0) | 2181 (tf->hob_nsect << 8) 2182 ); 2183 2184 if (!(qc->flags & ATA_QCFLAG_DMAMAP)) 2185 return AC_ERR_OK; 2186 mv_fill_sg(qc); 2187 2188 return AC_ERR_OK; 2189 } 2190 2191 /** 2192 * mv_sff_check_status - fetch device status, if valid 2193 * @ap: ATA port to fetch status from 2194 * 2195 * When using command issue via mv_qc_issue_fis(), 2196 * the initial ATA_BUSY state does not show up in the 2197 * ATA status (shadow) register. This can confuse libata! 2198 * 2199 * So we have a hook here to fake ATA_BUSY for that situation, 2200 * until the first time a BUSY, DRQ, or ERR bit is seen. 2201 * 2202 * The rest of the time, it simply returns the ATA status register. 2203 */ 2204 static u8 mv_sff_check_status(struct ata_port *ap) 2205 { 2206 u8 stat = ioread8(ap->ioaddr.status_addr); 2207 struct mv_port_priv *pp = ap->private_data; 2208 2209 if (pp->pp_flags & MV_PP_FLAG_FAKE_ATA_BUSY) { 2210 if (stat & (ATA_BUSY | ATA_DRQ | ATA_ERR)) 2211 pp->pp_flags &= ~MV_PP_FLAG_FAKE_ATA_BUSY; 2212 else 2213 stat = ATA_BUSY; 2214 } 2215 return stat; 2216 } 2217 2218 /** 2219 * mv_send_fis - Send a FIS, using the "Vendor-Unique FIS" register 2220 * @ap: ATA port to send a FIS 2221 * @fis: fis to be sent 2222 * @nwords: number of 32-bit words in the fis 2223 */ 2224 static unsigned int mv_send_fis(struct ata_port *ap, u32 *fis, int nwords) 2225 { 2226 void __iomem *port_mmio = mv_ap_base(ap); 2227 u32 ifctl, old_ifctl, ifstat; 2228 int i, timeout = 200, final_word = nwords - 1; 2229 2230 /* Initiate FIS transmission mode */ 2231 old_ifctl = readl(port_mmio + SATA_IFCTL); 2232 ifctl = 0x100 | (old_ifctl & 0xf); 2233 writelfl(ifctl, port_mmio + SATA_IFCTL); 2234 2235 /* Send all words of the FIS except for the final word */ 2236 for (i = 0; i < final_word; ++i) 2237 writel(fis[i], port_mmio + VENDOR_UNIQUE_FIS); 2238 2239 /* Flag end-of-transmission, and then send the final word */ 2240 writelfl(ifctl | 0x200, port_mmio + SATA_IFCTL); 2241 writelfl(fis[final_word], port_mmio + VENDOR_UNIQUE_FIS); 2242 2243 /* 2244 * Wait for FIS transmission to complete. 2245 * This typically takes just a single iteration. 2246 */ 2247 do { 2248 ifstat = readl(port_mmio + SATA_IFSTAT); 2249 } while (!(ifstat & 0x1000) && --timeout); 2250 2251 /* Restore original port configuration */ 2252 writelfl(old_ifctl, port_mmio + SATA_IFCTL); 2253 2254 /* See if it worked */ 2255 if ((ifstat & 0x3000) != 0x1000) { 2256 ata_port_warn(ap, "%s transmission error, ifstat=%08x\n", 2257 __func__, ifstat); 2258 return AC_ERR_OTHER; 2259 } 2260 return 0; 2261 } 2262 2263 /** 2264 * mv_qc_issue_fis - Issue a command directly as a FIS 2265 * @qc: queued command to start 2266 * 2267 * Note that the ATA shadow registers are not updated 2268 * after command issue, so the device will appear "READY" 2269 * if polled, even while it is BUSY processing the command. 2270 * 2271 * So we use a status hook to fake ATA_BUSY until the drive changes state. 2272 * 2273 * Note: we don't get updated shadow regs on *completion* 2274 * of non-data commands. So avoid sending them via this function, 2275 * as they will appear to have completed immediately. 2276 * 2277 * GEN_IIE has special registers that we could get the result tf from, 2278 * but earlier chipsets do not. For now, we ignore those registers. 2279 */ 2280 static unsigned int mv_qc_issue_fis(struct ata_queued_cmd *qc) 2281 { 2282 struct ata_port *ap = qc->ap; 2283 struct mv_port_priv *pp = ap->private_data; 2284 struct ata_link *link = qc->dev->link; 2285 u32 fis[5]; 2286 int err = 0; 2287 2288 ata_tf_to_fis(&qc->tf, link->pmp, 1, (void *)fis); 2289 err = mv_send_fis(ap, fis, ARRAY_SIZE(fis)); 2290 if (err) 2291 return err; 2292 2293 switch (qc->tf.protocol) { 2294 case ATAPI_PROT_PIO: 2295 pp->pp_flags |= MV_PP_FLAG_FAKE_ATA_BUSY; 2296 fallthrough; 2297 case ATAPI_PROT_NODATA: 2298 ap->hsm_task_state = HSM_ST_FIRST; 2299 break; 2300 case ATA_PROT_PIO: 2301 pp->pp_flags |= MV_PP_FLAG_FAKE_ATA_BUSY; 2302 if (qc->tf.flags & ATA_TFLAG_WRITE) 2303 ap->hsm_task_state = HSM_ST_FIRST; 2304 else 2305 ap->hsm_task_state = HSM_ST; 2306 break; 2307 default: 2308 ap->hsm_task_state = HSM_ST_LAST; 2309 break; 2310 } 2311 2312 if (qc->tf.flags & ATA_TFLAG_POLLING) 2313 ata_sff_queue_pio_task(link, 0); 2314 return 0; 2315 } 2316 2317 /** 2318 * mv_qc_issue - Initiate a command to the host 2319 * @qc: queued command to start 2320 * 2321 * This routine simply redirects to the general purpose routine 2322 * if command is not DMA. Else, it sanity checks our local 2323 * caches of the request producer/consumer indices then enables 2324 * DMA and bumps the request producer index. 2325 * 2326 * LOCKING: 2327 * Inherited from caller. 2328 */ 2329 static unsigned int mv_qc_issue(struct ata_queued_cmd *qc) 2330 { 2331 static int limit_warnings = 10; 2332 struct ata_port *ap = qc->ap; 2333 void __iomem *port_mmio = mv_ap_base(ap); 2334 struct mv_port_priv *pp = ap->private_data; 2335 u32 in_index; 2336 unsigned int port_irqs; 2337 2338 pp->pp_flags &= ~MV_PP_FLAG_FAKE_ATA_BUSY; /* paranoia */ 2339 2340 switch (qc->tf.protocol) { 2341 case ATA_PROT_DMA: 2342 if (qc->tf.command == ATA_CMD_DSM) { 2343 if (!ap->ops->bmdma_setup) /* no bmdma on GEN_I */ 2344 return AC_ERR_OTHER; 2345 break; /* use bmdma for this */ 2346 } 2347 fallthrough; 2348 case ATA_PROT_NCQ: 2349 mv_start_edma(ap, port_mmio, pp, qc->tf.protocol); 2350 pp->req_idx = (pp->req_idx + 1) & MV_MAX_Q_DEPTH_MASK; 2351 in_index = pp->req_idx << EDMA_REQ_Q_PTR_SHIFT; 2352 2353 /* Write the request in pointer to kick the EDMA to life */ 2354 writelfl((pp->crqb_dma & EDMA_REQ_Q_BASE_LO_MASK) | in_index, 2355 port_mmio + EDMA_REQ_Q_IN_PTR); 2356 return 0; 2357 2358 case ATA_PROT_PIO: 2359 /* 2360 * Errata SATA#16, SATA#24: warn if multiple DRQs expected. 2361 * 2362 * Someday, we might implement special polling workarounds 2363 * for these, but it all seems rather unnecessary since we 2364 * normally use only DMA for commands which transfer more 2365 * than a single block of data. 2366 * 2367 * Much of the time, this could just work regardless. 2368 * So for now, just log the incident, and allow the attempt. 2369 */ 2370 if (limit_warnings > 0 && (qc->nbytes / qc->sect_size) > 1) { 2371 --limit_warnings; 2372 ata_link_warn(qc->dev->link, DRV_NAME 2373 ": attempting PIO w/multiple DRQ: " 2374 "this may fail due to h/w errata\n"); 2375 } 2376 fallthrough; 2377 case ATA_PROT_NODATA: 2378 case ATAPI_PROT_PIO: 2379 case ATAPI_PROT_NODATA: 2380 if (ap->flags & ATA_FLAG_PIO_POLLING) 2381 qc->tf.flags |= ATA_TFLAG_POLLING; 2382 break; 2383 } 2384 2385 if (qc->tf.flags & ATA_TFLAG_POLLING) 2386 port_irqs = ERR_IRQ; /* mask device interrupt when polling */ 2387 else 2388 port_irqs = ERR_IRQ | DONE_IRQ; /* unmask all interrupts */ 2389 2390 /* 2391 * We're about to send a non-EDMA capable command to the 2392 * port. Turn off EDMA so there won't be problems accessing 2393 * shadow block, etc registers. 2394 */ 2395 mv_stop_edma(ap); 2396 mv_clear_and_enable_port_irqs(ap, mv_ap_base(ap), port_irqs); 2397 mv_pmp_select(ap, qc->dev->link->pmp); 2398 2399 if (qc->tf.command == ATA_CMD_READ_LOG_EXT) { 2400 struct mv_host_priv *hpriv = ap->host->private_data; 2401 /* 2402 * Workaround for 88SX60x1 FEr SATA#25 (part 2). 2403 * 2404 * After any NCQ error, the READ_LOG_EXT command 2405 * from libata-eh *must* use mv_qc_issue_fis(). 2406 * Otherwise it might fail, due to chip errata. 2407 * 2408 * Rather than special-case it, we'll just *always* 2409 * use this method here for READ_LOG_EXT, making for 2410 * easier testing. 2411 */ 2412 if (IS_GEN_II(hpriv)) 2413 return mv_qc_issue_fis(qc); 2414 } 2415 return ata_bmdma_qc_issue(qc); 2416 } 2417 2418 static struct ata_queued_cmd *mv_get_active_qc(struct ata_port *ap) 2419 { 2420 struct mv_port_priv *pp = ap->private_data; 2421 struct ata_queued_cmd *qc; 2422 2423 if (pp->pp_flags & MV_PP_FLAG_NCQ_EN) 2424 return NULL; 2425 qc = ata_qc_from_tag(ap, ap->link.active_tag); 2426 if (qc && !(qc->tf.flags & ATA_TFLAG_POLLING)) 2427 return qc; 2428 return NULL; 2429 } 2430 2431 static void mv_pmp_error_handler(struct ata_port *ap) 2432 { 2433 unsigned int pmp, pmp_map; 2434 struct mv_port_priv *pp = ap->private_data; 2435 2436 if (pp->pp_flags & MV_PP_FLAG_DELAYED_EH) { 2437 /* 2438 * Perform NCQ error analysis on failed PMPs 2439 * before we freeze the port entirely. 2440 * 2441 * The failed PMPs are marked earlier by mv_pmp_eh_prep(). 2442 */ 2443 pmp_map = pp->delayed_eh_pmp_map; 2444 pp->pp_flags &= ~MV_PP_FLAG_DELAYED_EH; 2445 for (pmp = 0; pmp_map != 0; pmp++) { 2446 unsigned int this_pmp = (1 << pmp); 2447 if (pmp_map & this_pmp) { 2448 struct ata_link *link = &ap->pmp_link[pmp]; 2449 pmp_map &= ~this_pmp; 2450 ata_eh_analyze_ncq_error(link); 2451 } 2452 } 2453 ata_port_freeze(ap); 2454 } 2455 sata_pmp_error_handler(ap); 2456 } 2457 2458 static unsigned int mv_get_err_pmp_map(struct ata_port *ap) 2459 { 2460 void __iomem *port_mmio = mv_ap_base(ap); 2461 2462 return readl(port_mmio + SATA_TESTCTL) >> 16; 2463 } 2464 2465 static void mv_pmp_eh_prep(struct ata_port *ap, unsigned int pmp_map) 2466 { 2467 unsigned int pmp; 2468 2469 /* 2470 * Initialize EH info for PMPs which saw device errors 2471 */ 2472 for (pmp = 0; pmp_map != 0; pmp++) { 2473 unsigned int this_pmp = (1 << pmp); 2474 if (pmp_map & this_pmp) { 2475 struct ata_link *link = &ap->pmp_link[pmp]; 2476 struct ata_eh_info *ehi = &link->eh_info; 2477 2478 pmp_map &= ~this_pmp; 2479 ata_ehi_clear_desc(ehi); 2480 ata_ehi_push_desc(ehi, "dev err"); 2481 ehi->err_mask |= AC_ERR_DEV; 2482 ehi->action |= ATA_EH_RESET; 2483 ata_link_abort(link); 2484 } 2485 } 2486 } 2487 2488 static int mv_req_q_empty(struct ata_port *ap) 2489 { 2490 void __iomem *port_mmio = mv_ap_base(ap); 2491 u32 in_ptr, out_ptr; 2492 2493 in_ptr = (readl(port_mmio + EDMA_REQ_Q_IN_PTR) 2494 >> EDMA_REQ_Q_PTR_SHIFT) & MV_MAX_Q_DEPTH_MASK; 2495 out_ptr = (readl(port_mmio + EDMA_REQ_Q_OUT_PTR) 2496 >> EDMA_REQ_Q_PTR_SHIFT) & MV_MAX_Q_DEPTH_MASK; 2497 return (in_ptr == out_ptr); /* 1 == queue_is_empty */ 2498 } 2499 2500 static int mv_handle_fbs_ncq_dev_err(struct ata_port *ap) 2501 { 2502 struct mv_port_priv *pp = ap->private_data; 2503 int failed_links; 2504 unsigned int old_map, new_map; 2505 2506 /* 2507 * Device error during FBS+NCQ operation: 2508 * 2509 * Set a port flag to prevent further I/O being enqueued. 2510 * Leave the EDMA running to drain outstanding commands from this port. 2511 * Perform the post-mortem/EH only when all responses are complete. 2512 * Follow recovery sequence from 6042/7042 datasheet (7.3.15.4.2.2). 2513 */ 2514 if (!(pp->pp_flags & MV_PP_FLAG_DELAYED_EH)) { 2515 pp->pp_flags |= MV_PP_FLAG_DELAYED_EH; 2516 pp->delayed_eh_pmp_map = 0; 2517 } 2518 old_map = pp->delayed_eh_pmp_map; 2519 new_map = old_map | mv_get_err_pmp_map(ap); 2520 2521 if (old_map != new_map) { 2522 pp->delayed_eh_pmp_map = new_map; 2523 mv_pmp_eh_prep(ap, new_map & ~old_map); 2524 } 2525 failed_links = hweight16(new_map); 2526 2527 ata_port_info(ap, 2528 "%s: pmp_map=%04x qc_map=%04llx failed_links=%d nr_active_links=%d\n", 2529 __func__, pp->delayed_eh_pmp_map, 2530 ap->qc_active, failed_links, 2531 ap->nr_active_links); 2532 2533 if (ap->nr_active_links <= failed_links && mv_req_q_empty(ap)) { 2534 mv_process_crpb_entries(ap, pp); 2535 mv_stop_edma(ap); 2536 mv_eh_freeze(ap); 2537 ata_port_info(ap, "%s: done\n", __func__); 2538 return 1; /* handled */ 2539 } 2540 ata_port_info(ap, "%s: waiting\n", __func__); 2541 return 1; /* handled */ 2542 } 2543 2544 static int mv_handle_fbs_non_ncq_dev_err(struct ata_port *ap) 2545 { 2546 /* 2547 * Possible future enhancement: 2548 * 2549 * FBS+non-NCQ operation is not yet implemented. 2550 * See related notes in mv_edma_cfg(). 2551 * 2552 * Device error during FBS+non-NCQ operation: 2553 * 2554 * We need to snapshot the shadow registers for each failed command. 2555 * Follow recovery sequence from 6042/7042 datasheet (7.3.15.4.2.3). 2556 */ 2557 return 0; /* not handled */ 2558 } 2559 2560 static int mv_handle_dev_err(struct ata_port *ap, u32 edma_err_cause) 2561 { 2562 struct mv_port_priv *pp = ap->private_data; 2563 2564 if (!(pp->pp_flags & MV_PP_FLAG_EDMA_EN)) 2565 return 0; /* EDMA was not active: not handled */ 2566 if (!(pp->pp_flags & MV_PP_FLAG_FBS_EN)) 2567 return 0; /* FBS was not active: not handled */ 2568 2569 if (!(edma_err_cause & EDMA_ERR_DEV)) 2570 return 0; /* non DEV error: not handled */ 2571 edma_err_cause &= ~EDMA_ERR_IRQ_TRANSIENT; 2572 if (edma_err_cause & ~(EDMA_ERR_DEV | EDMA_ERR_SELF_DIS)) 2573 return 0; /* other problems: not handled */ 2574 2575 if (pp->pp_flags & MV_PP_FLAG_NCQ_EN) { 2576 /* 2577 * EDMA should NOT have self-disabled for this case. 2578 * If it did, then something is wrong elsewhere, 2579 * and we cannot handle it here. 2580 */ 2581 if (edma_err_cause & EDMA_ERR_SELF_DIS) { 2582 ata_port_warn(ap, "%s: err_cause=0x%x pp_flags=0x%x\n", 2583 __func__, edma_err_cause, pp->pp_flags); 2584 return 0; /* not handled */ 2585 } 2586 return mv_handle_fbs_ncq_dev_err(ap); 2587 } else { 2588 /* 2589 * EDMA should have self-disabled for this case. 2590 * If it did not, then something is wrong elsewhere, 2591 * and we cannot handle it here. 2592 */ 2593 if (!(edma_err_cause & EDMA_ERR_SELF_DIS)) { 2594 ata_port_warn(ap, "%s: err_cause=0x%x pp_flags=0x%x\n", 2595 __func__, edma_err_cause, pp->pp_flags); 2596 return 0; /* not handled */ 2597 } 2598 return mv_handle_fbs_non_ncq_dev_err(ap); 2599 } 2600 return 0; /* not handled */ 2601 } 2602 2603 static void mv_unexpected_intr(struct ata_port *ap, int edma_was_enabled) 2604 { 2605 struct ata_eh_info *ehi = &ap->link.eh_info; 2606 char *when = "idle"; 2607 2608 ata_ehi_clear_desc(ehi); 2609 if (edma_was_enabled) { 2610 when = "EDMA enabled"; 2611 } else { 2612 struct ata_queued_cmd *qc = ata_qc_from_tag(ap, ap->link.active_tag); 2613 if (qc && (qc->tf.flags & ATA_TFLAG_POLLING)) 2614 when = "polling"; 2615 } 2616 ata_ehi_push_desc(ehi, "unexpected device interrupt while %s", when); 2617 ehi->err_mask |= AC_ERR_OTHER; 2618 ehi->action |= ATA_EH_RESET; 2619 ata_port_freeze(ap); 2620 } 2621 2622 /** 2623 * mv_err_intr - Handle error interrupts on the port 2624 * @ap: ATA channel to manipulate 2625 * 2626 * Most cases require a full reset of the chip's state machine, 2627 * which also performs a COMRESET. 2628 * Also, if the port disabled DMA, update our cached copy to match. 2629 * 2630 * LOCKING: 2631 * Inherited from caller. 2632 */ 2633 static void mv_err_intr(struct ata_port *ap) 2634 { 2635 void __iomem *port_mmio = mv_ap_base(ap); 2636 u32 edma_err_cause, eh_freeze_mask, serr = 0; 2637 u32 fis_cause = 0; 2638 struct mv_port_priv *pp = ap->private_data; 2639 struct mv_host_priv *hpriv = ap->host->private_data; 2640 unsigned int action = 0, err_mask = 0; 2641 struct ata_eh_info *ehi = &ap->link.eh_info; 2642 struct ata_queued_cmd *qc; 2643 int abort = 0; 2644 2645 /* 2646 * Read and clear the SError and err_cause bits. 2647 * For GenIIe, if EDMA_ERR_TRANS_IRQ_7 is set, we also must read/clear 2648 * the FIS_IRQ_CAUSE register before clearing edma_err_cause. 2649 */ 2650 sata_scr_read(&ap->link, SCR_ERROR, &serr); 2651 sata_scr_write_flush(&ap->link, SCR_ERROR, serr); 2652 2653 edma_err_cause = readl(port_mmio + EDMA_ERR_IRQ_CAUSE); 2654 if (IS_GEN_IIE(hpriv) && (edma_err_cause & EDMA_ERR_TRANS_IRQ_7)) { 2655 fis_cause = readl(port_mmio + FIS_IRQ_CAUSE); 2656 writelfl(~fis_cause, port_mmio + FIS_IRQ_CAUSE); 2657 } 2658 writelfl(~edma_err_cause, port_mmio + EDMA_ERR_IRQ_CAUSE); 2659 2660 if (edma_err_cause & EDMA_ERR_DEV) { 2661 /* 2662 * Device errors during FIS-based switching operation 2663 * require special handling. 2664 */ 2665 if (mv_handle_dev_err(ap, edma_err_cause)) 2666 return; 2667 } 2668 2669 qc = mv_get_active_qc(ap); 2670 ata_ehi_clear_desc(ehi); 2671 ata_ehi_push_desc(ehi, "edma_err_cause=%08x pp_flags=%08x", 2672 edma_err_cause, pp->pp_flags); 2673 2674 if (IS_GEN_IIE(hpriv) && (edma_err_cause & EDMA_ERR_TRANS_IRQ_7)) { 2675 ata_ehi_push_desc(ehi, "fis_cause=%08x", fis_cause); 2676 if (fis_cause & FIS_IRQ_CAUSE_AN) { 2677 u32 ec = edma_err_cause & 2678 ~(EDMA_ERR_TRANS_IRQ_7 | EDMA_ERR_IRQ_TRANSIENT); 2679 sata_async_notification(ap); 2680 if (!ec) 2681 return; /* Just an AN; no need for the nukes */ 2682 ata_ehi_push_desc(ehi, "SDB notify"); 2683 } 2684 } 2685 /* 2686 * All generations share these EDMA error cause bits: 2687 */ 2688 if (edma_err_cause & EDMA_ERR_DEV) { 2689 err_mask |= AC_ERR_DEV; 2690 action |= ATA_EH_RESET; 2691 ata_ehi_push_desc(ehi, "dev error"); 2692 } 2693 if (edma_err_cause & (EDMA_ERR_D_PAR | EDMA_ERR_PRD_PAR | 2694 EDMA_ERR_CRQB_PAR | EDMA_ERR_CRPB_PAR | 2695 EDMA_ERR_INTRL_PAR)) { 2696 err_mask |= AC_ERR_ATA_BUS; 2697 action |= ATA_EH_RESET; 2698 ata_ehi_push_desc(ehi, "parity error"); 2699 } 2700 if (edma_err_cause & (EDMA_ERR_DEV_DCON | EDMA_ERR_DEV_CON)) { 2701 ata_ehi_hotplugged(ehi); 2702 ata_ehi_push_desc(ehi, edma_err_cause & EDMA_ERR_DEV_DCON ? 2703 "dev disconnect" : "dev connect"); 2704 action |= ATA_EH_RESET; 2705 } 2706 2707 /* 2708 * Gen-I has a different SELF_DIS bit, 2709 * different FREEZE bits, and no SERR bit: 2710 */ 2711 if (IS_GEN_I(hpriv)) { 2712 eh_freeze_mask = EDMA_EH_FREEZE_5; 2713 if (edma_err_cause & EDMA_ERR_SELF_DIS_5) { 2714 pp->pp_flags &= ~MV_PP_FLAG_EDMA_EN; 2715 ata_ehi_push_desc(ehi, "EDMA self-disable"); 2716 } 2717 } else { 2718 eh_freeze_mask = EDMA_EH_FREEZE; 2719 if (edma_err_cause & EDMA_ERR_SELF_DIS) { 2720 pp->pp_flags &= ~MV_PP_FLAG_EDMA_EN; 2721 ata_ehi_push_desc(ehi, "EDMA self-disable"); 2722 } 2723 if (edma_err_cause & EDMA_ERR_SERR) { 2724 ata_ehi_push_desc(ehi, "SError=%08x", serr); 2725 err_mask |= AC_ERR_ATA_BUS; 2726 action |= ATA_EH_RESET; 2727 } 2728 } 2729 2730 if (!err_mask) { 2731 err_mask = AC_ERR_OTHER; 2732 action |= ATA_EH_RESET; 2733 } 2734 2735 ehi->serror |= serr; 2736 ehi->action |= action; 2737 2738 if (qc) 2739 qc->err_mask |= err_mask; 2740 else 2741 ehi->err_mask |= err_mask; 2742 2743 if (err_mask == AC_ERR_DEV) { 2744 /* 2745 * Cannot do ata_port_freeze() here, 2746 * because it would kill PIO access, 2747 * which is needed for further diagnosis. 2748 */ 2749 mv_eh_freeze(ap); 2750 abort = 1; 2751 } else if (edma_err_cause & eh_freeze_mask) { 2752 /* 2753 * Note to self: ata_port_freeze() calls ata_port_abort() 2754 */ 2755 ata_port_freeze(ap); 2756 } else { 2757 abort = 1; 2758 } 2759 2760 if (abort) { 2761 if (qc) 2762 ata_link_abort(qc->dev->link); 2763 else 2764 ata_port_abort(ap); 2765 } 2766 } 2767 2768 static bool mv_process_crpb_response(struct ata_port *ap, 2769 struct mv_crpb *response, unsigned int tag, int ncq_enabled) 2770 { 2771 u8 ata_status; 2772 u16 edma_status = le16_to_cpu(response->flags); 2773 2774 /* 2775 * edma_status from a response queue entry: 2776 * LSB is from EDMA_ERR_IRQ_CAUSE (non-NCQ only). 2777 * MSB is saved ATA status from command completion. 2778 */ 2779 if (!ncq_enabled) { 2780 u8 err_cause = edma_status & 0xff & ~EDMA_ERR_DEV; 2781 if (err_cause) { 2782 /* 2783 * Error will be seen/handled by 2784 * mv_err_intr(). So do nothing at all here. 2785 */ 2786 return false; 2787 } 2788 } 2789 ata_status = edma_status >> CRPB_FLAG_STATUS_SHIFT; 2790 if (!ac_err_mask(ata_status)) 2791 return true; 2792 /* else: leave it for mv_err_intr() */ 2793 return false; 2794 } 2795 2796 static void mv_process_crpb_entries(struct ata_port *ap, struct mv_port_priv *pp) 2797 { 2798 void __iomem *port_mmio = mv_ap_base(ap); 2799 struct mv_host_priv *hpriv = ap->host->private_data; 2800 u32 in_index; 2801 bool work_done = false; 2802 u32 done_mask = 0; 2803 int ncq_enabled = (pp->pp_flags & MV_PP_FLAG_NCQ_EN); 2804 2805 /* Get the hardware queue position index */ 2806 in_index = (readl(port_mmio + EDMA_RSP_Q_IN_PTR) 2807 >> EDMA_RSP_Q_PTR_SHIFT) & MV_MAX_Q_DEPTH_MASK; 2808 2809 /* Process new responses from since the last time we looked */ 2810 while (in_index != pp->resp_idx) { 2811 unsigned int tag; 2812 struct mv_crpb *response = &pp->crpb[pp->resp_idx]; 2813 2814 pp->resp_idx = (pp->resp_idx + 1) & MV_MAX_Q_DEPTH_MASK; 2815 2816 if (IS_GEN_I(hpriv)) { 2817 /* 50xx: no NCQ, only one command active at a time */ 2818 tag = ap->link.active_tag; 2819 } else { 2820 /* Gen II/IIE: get command tag from CRPB entry */ 2821 tag = le16_to_cpu(response->id) & 0x1f; 2822 } 2823 if (mv_process_crpb_response(ap, response, tag, ncq_enabled)) 2824 done_mask |= 1 << tag; 2825 work_done = true; 2826 } 2827 2828 if (work_done) { 2829 ata_qc_complete_multiple(ap, ata_qc_get_active(ap) ^ done_mask); 2830 2831 /* Update the software queue position index in hardware */ 2832 writelfl((pp->crpb_dma & EDMA_RSP_Q_BASE_LO_MASK) | 2833 (pp->resp_idx << EDMA_RSP_Q_PTR_SHIFT), 2834 port_mmio + EDMA_RSP_Q_OUT_PTR); 2835 } 2836 } 2837 2838 static void mv_port_intr(struct ata_port *ap, u32 port_cause) 2839 { 2840 struct mv_port_priv *pp; 2841 int edma_was_enabled; 2842 2843 /* 2844 * Grab a snapshot of the EDMA_EN flag setting, 2845 * so that we have a consistent view for this port, 2846 * even if something we call of our routines changes it. 2847 */ 2848 pp = ap->private_data; 2849 edma_was_enabled = (pp->pp_flags & MV_PP_FLAG_EDMA_EN); 2850 /* 2851 * Process completed CRPB response(s) before other events. 2852 */ 2853 if (edma_was_enabled && (port_cause & DONE_IRQ)) { 2854 mv_process_crpb_entries(ap, pp); 2855 if (pp->pp_flags & MV_PP_FLAG_DELAYED_EH) 2856 mv_handle_fbs_ncq_dev_err(ap); 2857 } 2858 /* 2859 * Handle chip-reported errors, or continue on to handle PIO. 2860 */ 2861 if (unlikely(port_cause & ERR_IRQ)) { 2862 mv_err_intr(ap); 2863 } else if (!edma_was_enabled) { 2864 struct ata_queued_cmd *qc = mv_get_active_qc(ap); 2865 if (qc) 2866 ata_bmdma_port_intr(ap, qc); 2867 else 2868 mv_unexpected_intr(ap, edma_was_enabled); 2869 } 2870 } 2871 2872 /** 2873 * mv_host_intr - Handle all interrupts on the given host controller 2874 * @host: host specific structure 2875 * @main_irq_cause: Main interrupt cause register for the chip. 2876 * 2877 * LOCKING: 2878 * Inherited from caller. 2879 */ 2880 static int mv_host_intr(struct ata_host *host, u32 main_irq_cause) 2881 { 2882 struct mv_host_priv *hpriv = host->private_data; 2883 void __iomem *mmio = hpriv->base, *hc_mmio; 2884 unsigned int handled = 0, port; 2885 2886 /* If asserted, clear the "all ports" IRQ coalescing bit */ 2887 if (main_irq_cause & ALL_PORTS_COAL_DONE) 2888 writel(~ALL_PORTS_COAL_IRQ, mmio + IRQ_COAL_CAUSE); 2889 2890 for (port = 0; port < hpriv->n_ports; port++) { 2891 struct ata_port *ap = host->ports[port]; 2892 unsigned int p, shift, hardport, port_cause; 2893 2894 MV_PORT_TO_SHIFT_AND_HARDPORT(port, shift, hardport); 2895 /* 2896 * Each hc within the host has its own hc_irq_cause register, 2897 * where the interrupting ports bits get ack'd. 2898 */ 2899 if (hardport == 0) { /* first port on this hc ? */ 2900 u32 hc_cause = (main_irq_cause >> shift) & HC0_IRQ_PEND; 2901 u32 port_mask, ack_irqs; 2902 /* 2903 * Skip this entire hc if nothing pending for any ports 2904 */ 2905 if (!hc_cause) { 2906 port += MV_PORTS_PER_HC - 1; 2907 continue; 2908 } 2909 /* 2910 * We don't need/want to read the hc_irq_cause register, 2911 * because doing so hurts performance, and 2912 * main_irq_cause already gives us everything we need. 2913 * 2914 * But we do have to *write* to the hc_irq_cause to ack 2915 * the ports that we are handling this time through. 2916 * 2917 * This requires that we create a bitmap for those 2918 * ports which interrupted us, and use that bitmap 2919 * to ack (only) those ports via hc_irq_cause. 2920 */ 2921 ack_irqs = 0; 2922 if (hc_cause & PORTS_0_3_COAL_DONE) 2923 ack_irqs = HC_COAL_IRQ; 2924 for (p = 0; p < MV_PORTS_PER_HC; ++p) { 2925 if ((port + p) >= hpriv->n_ports) 2926 break; 2927 port_mask = (DONE_IRQ | ERR_IRQ) << (p * 2); 2928 if (hc_cause & port_mask) 2929 ack_irqs |= (DMA_IRQ | DEV_IRQ) << p; 2930 } 2931 hc_mmio = mv_hc_base_from_port(mmio, port); 2932 writelfl(~ack_irqs, hc_mmio + HC_IRQ_CAUSE); 2933 handled = 1; 2934 } 2935 /* 2936 * Handle interrupts signalled for this port: 2937 */ 2938 port_cause = (main_irq_cause >> shift) & (DONE_IRQ | ERR_IRQ); 2939 if (port_cause) 2940 mv_port_intr(ap, port_cause); 2941 } 2942 return handled; 2943 } 2944 2945 static int mv_pci_error(struct ata_host *host, void __iomem *mmio) 2946 { 2947 struct mv_host_priv *hpriv = host->private_data; 2948 struct ata_port *ap; 2949 struct ata_queued_cmd *qc; 2950 struct ata_eh_info *ehi; 2951 unsigned int i, err_mask, printed = 0; 2952 u32 err_cause; 2953 2954 err_cause = readl(mmio + hpriv->irq_cause_offset); 2955 2956 dev_err(host->dev, "PCI ERROR; PCI IRQ cause=0x%08x\n", err_cause); 2957 2958 dev_dbg(host->dev, "%s: All regs @ PCI error\n", __func__); 2959 mv_dump_all_regs(mmio, to_pci_dev(host->dev)); 2960 2961 writelfl(0, mmio + hpriv->irq_cause_offset); 2962 2963 for (i = 0; i < host->n_ports; i++) { 2964 ap = host->ports[i]; 2965 if (!ata_link_offline(&ap->link)) { 2966 ehi = &ap->link.eh_info; 2967 ata_ehi_clear_desc(ehi); 2968 if (!printed++) 2969 ata_ehi_push_desc(ehi, 2970 "PCI err cause 0x%08x", err_cause); 2971 err_mask = AC_ERR_HOST_BUS; 2972 ehi->action = ATA_EH_RESET; 2973 qc = ata_qc_from_tag(ap, ap->link.active_tag); 2974 if (qc) 2975 qc->err_mask |= err_mask; 2976 else 2977 ehi->err_mask |= err_mask; 2978 2979 ata_port_freeze(ap); 2980 } 2981 } 2982 return 1; /* handled */ 2983 } 2984 2985 /** 2986 * mv_interrupt - Main interrupt event handler 2987 * @irq: unused 2988 * @dev_instance: private data; in this case the host structure 2989 * 2990 * Read the read only register to determine if any host 2991 * controllers have pending interrupts. If so, call lower level 2992 * routine to handle. Also check for PCI errors which are only 2993 * reported here. 2994 * 2995 * LOCKING: 2996 * This routine holds the host lock while processing pending 2997 * interrupts. 2998 */ 2999 static irqreturn_t mv_interrupt(int irq, void *dev_instance) 3000 { 3001 struct ata_host *host = dev_instance; 3002 struct mv_host_priv *hpriv = host->private_data; 3003 unsigned int handled = 0; 3004 int using_msi = hpriv->hp_flags & MV_HP_FLAG_MSI; 3005 u32 main_irq_cause, pending_irqs; 3006 3007 spin_lock(&host->lock); 3008 3009 /* for MSI: block new interrupts while in here */ 3010 if (using_msi) 3011 mv_write_main_irq_mask(0, hpriv); 3012 3013 main_irq_cause = readl(hpriv->main_irq_cause_addr); 3014 pending_irqs = main_irq_cause & hpriv->main_irq_mask; 3015 /* 3016 * Deal with cases where we either have nothing pending, or have read 3017 * a bogus register value which can indicate HW removal or PCI fault. 3018 */ 3019 if (pending_irqs && main_irq_cause != 0xffffffffU) { 3020 if (unlikely((pending_irqs & PCI_ERR) && !IS_SOC(hpriv))) 3021 handled = mv_pci_error(host, hpriv->base); 3022 else 3023 handled = mv_host_intr(host, pending_irqs); 3024 } 3025 3026 /* for MSI: unmask; interrupt cause bits will retrigger now */ 3027 if (using_msi) 3028 mv_write_main_irq_mask(hpriv->main_irq_mask, hpriv); 3029 3030 spin_unlock(&host->lock); 3031 3032 return IRQ_RETVAL(handled); 3033 } 3034 3035 static unsigned int mv5_scr_offset(unsigned int sc_reg_in) 3036 { 3037 unsigned int ofs; 3038 3039 switch (sc_reg_in) { 3040 case SCR_STATUS: 3041 case SCR_ERROR: 3042 case SCR_CONTROL: 3043 ofs = sc_reg_in * sizeof(u32); 3044 break; 3045 default: 3046 ofs = 0xffffffffU; 3047 break; 3048 } 3049 return ofs; 3050 } 3051 3052 static int mv5_scr_read(struct ata_link *link, unsigned int sc_reg_in, u32 *val) 3053 { 3054 struct mv_host_priv *hpriv = link->ap->host->private_data; 3055 void __iomem *mmio = hpriv->base; 3056 void __iomem *addr = mv5_phy_base(mmio, link->ap->port_no); 3057 unsigned int ofs = mv5_scr_offset(sc_reg_in); 3058 3059 if (ofs != 0xffffffffU) { 3060 *val = readl(addr + ofs); 3061 return 0; 3062 } else 3063 return -EINVAL; 3064 } 3065 3066 static int mv5_scr_write(struct ata_link *link, unsigned int sc_reg_in, u32 val) 3067 { 3068 struct mv_host_priv *hpriv = link->ap->host->private_data; 3069 void __iomem *mmio = hpriv->base; 3070 void __iomem *addr = mv5_phy_base(mmio, link->ap->port_no); 3071 unsigned int ofs = mv5_scr_offset(sc_reg_in); 3072 3073 if (ofs != 0xffffffffU) { 3074 writelfl(val, addr + ofs); 3075 return 0; 3076 } else 3077 return -EINVAL; 3078 } 3079 3080 static void mv5_reset_bus(struct ata_host *host, void __iomem *mmio) 3081 { 3082 struct pci_dev *pdev = to_pci_dev(host->dev); 3083 int early_5080; 3084 3085 early_5080 = (pdev->device == 0x5080) && (pdev->revision == 0); 3086 3087 if (!early_5080) { 3088 u32 tmp = readl(mmio + MV_PCI_EXP_ROM_BAR_CTL); 3089 tmp |= (1 << 0); 3090 writel(tmp, mmio + MV_PCI_EXP_ROM_BAR_CTL); 3091 } 3092 3093 mv_reset_pci_bus(host, mmio); 3094 } 3095 3096 static void mv5_reset_flash(struct mv_host_priv *hpriv, void __iomem *mmio) 3097 { 3098 writel(0x0fcfffff, mmio + FLASH_CTL); 3099 } 3100 3101 static void mv5_read_preamp(struct mv_host_priv *hpriv, int idx, 3102 void __iomem *mmio) 3103 { 3104 void __iomem *phy_mmio = mv5_phy_base(mmio, idx); 3105 u32 tmp; 3106 3107 tmp = readl(phy_mmio + MV5_PHY_MODE); 3108 3109 hpriv->signal[idx].pre = tmp & 0x1800; /* bits 12:11 */ 3110 hpriv->signal[idx].amps = tmp & 0xe0; /* bits 7:5 */ 3111 } 3112 3113 static void mv5_enable_leds(struct mv_host_priv *hpriv, void __iomem *mmio) 3114 { 3115 u32 tmp; 3116 3117 writel(0, mmio + GPIO_PORT_CTL); 3118 3119 /* FIXME: handle MV_HP_ERRATA_50XXB2 errata */ 3120 3121 tmp = readl(mmio + MV_PCI_EXP_ROM_BAR_CTL); 3122 tmp |= ~(1 << 0); 3123 writel(tmp, mmio + MV_PCI_EXP_ROM_BAR_CTL); 3124 } 3125 3126 static void mv5_phy_errata(struct mv_host_priv *hpriv, void __iomem *mmio, 3127 unsigned int port) 3128 { 3129 void __iomem *phy_mmio = mv5_phy_base(mmio, port); 3130 const u32 mask = (1<<12) | (1<<11) | (1<<7) | (1<<6) | (1<<5); 3131 u32 tmp; 3132 int fix_apm_sq = (hpriv->hp_flags & MV_HP_ERRATA_50XXB0); 3133 3134 if (fix_apm_sq) { 3135 tmp = readl(phy_mmio + MV5_LTMODE); 3136 tmp |= (1 << 19); 3137 writel(tmp, phy_mmio + MV5_LTMODE); 3138 3139 tmp = readl(phy_mmio + MV5_PHY_CTL); 3140 tmp &= ~0x3; 3141 tmp |= 0x1; 3142 writel(tmp, phy_mmio + MV5_PHY_CTL); 3143 } 3144 3145 tmp = readl(phy_mmio + MV5_PHY_MODE); 3146 tmp &= ~mask; 3147 tmp |= hpriv->signal[port].pre; 3148 tmp |= hpriv->signal[port].amps; 3149 writel(tmp, phy_mmio + MV5_PHY_MODE); 3150 } 3151 3152 3153 #undef ZERO 3154 #define ZERO(reg) writel(0, port_mmio + (reg)) 3155 static void mv5_reset_hc_port(struct mv_host_priv *hpriv, void __iomem *mmio, 3156 unsigned int port) 3157 { 3158 void __iomem *port_mmio = mv_port_base(mmio, port); 3159 3160 mv_reset_channel(hpriv, mmio, port); 3161 3162 ZERO(0x028); /* command */ 3163 writel(0x11f, port_mmio + EDMA_CFG); 3164 ZERO(0x004); /* timer */ 3165 ZERO(0x008); /* irq err cause */ 3166 ZERO(0x00c); /* irq err mask */ 3167 ZERO(0x010); /* rq bah */ 3168 ZERO(0x014); /* rq inp */ 3169 ZERO(0x018); /* rq outp */ 3170 ZERO(0x01c); /* respq bah */ 3171 ZERO(0x024); /* respq outp */ 3172 ZERO(0x020); /* respq inp */ 3173 ZERO(0x02c); /* test control */ 3174 writel(0xbc, port_mmio + EDMA_IORDY_TMOUT); 3175 } 3176 #undef ZERO 3177 3178 #define ZERO(reg) writel(0, hc_mmio + (reg)) 3179 static void mv5_reset_one_hc(struct mv_host_priv *hpriv, void __iomem *mmio, 3180 unsigned int hc) 3181 { 3182 void __iomem *hc_mmio = mv_hc_base(mmio, hc); 3183 u32 tmp; 3184 3185 ZERO(0x00c); 3186 ZERO(0x010); 3187 ZERO(0x014); 3188 ZERO(0x018); 3189 3190 tmp = readl(hc_mmio + 0x20); 3191 tmp &= 0x1c1c1c1c; 3192 tmp |= 0x03030303; 3193 writel(tmp, hc_mmio + 0x20); 3194 } 3195 #undef ZERO 3196 3197 static int mv5_reset_hc(struct ata_host *host, void __iomem *mmio, 3198 unsigned int n_hc) 3199 { 3200 struct mv_host_priv *hpriv = host->private_data; 3201 unsigned int hc, port; 3202 3203 for (hc = 0; hc < n_hc; hc++) { 3204 for (port = 0; port < MV_PORTS_PER_HC; port++) 3205 mv5_reset_hc_port(hpriv, mmio, 3206 (hc * MV_PORTS_PER_HC) + port); 3207 3208 mv5_reset_one_hc(hpriv, mmio, hc); 3209 } 3210 3211 return 0; 3212 } 3213 3214 #undef ZERO 3215 #define ZERO(reg) writel(0, mmio + (reg)) 3216 static void mv_reset_pci_bus(struct ata_host *host, void __iomem *mmio) 3217 { 3218 struct mv_host_priv *hpriv = host->private_data; 3219 u32 tmp; 3220 3221 tmp = readl(mmio + MV_PCI_MODE); 3222 tmp &= 0xff00ffff; 3223 writel(tmp, mmio + MV_PCI_MODE); 3224 3225 ZERO(MV_PCI_DISC_TIMER); 3226 ZERO(MV_PCI_MSI_TRIGGER); 3227 writel(0x000100ff, mmio + MV_PCI_XBAR_TMOUT); 3228 ZERO(MV_PCI_SERR_MASK); 3229 ZERO(hpriv->irq_cause_offset); 3230 ZERO(hpriv->irq_mask_offset); 3231 ZERO(MV_PCI_ERR_LOW_ADDRESS); 3232 ZERO(MV_PCI_ERR_HIGH_ADDRESS); 3233 ZERO(MV_PCI_ERR_ATTRIBUTE); 3234 ZERO(MV_PCI_ERR_COMMAND); 3235 } 3236 #undef ZERO 3237 3238 static void mv6_reset_flash(struct mv_host_priv *hpriv, void __iomem *mmio) 3239 { 3240 u32 tmp; 3241 3242 mv5_reset_flash(hpriv, mmio); 3243 3244 tmp = readl(mmio + GPIO_PORT_CTL); 3245 tmp &= 0x3; 3246 tmp |= (1 << 5) | (1 << 6); 3247 writel(tmp, mmio + GPIO_PORT_CTL); 3248 } 3249 3250 /* 3251 * mv6_reset_hc - Perform the 6xxx global soft reset 3252 * @mmio: base address of the HBA 3253 * 3254 * This routine only applies to 6xxx parts. 3255 * 3256 * LOCKING: 3257 * Inherited from caller. 3258 */ 3259 static int mv6_reset_hc(struct ata_host *host, void __iomem *mmio, 3260 unsigned int n_hc) 3261 { 3262 void __iomem *reg = mmio + PCI_MAIN_CMD_STS; 3263 int i, rc = 0; 3264 u32 t; 3265 3266 /* Following procedure defined in PCI "main command and status 3267 * register" table. 3268 */ 3269 t = readl(reg); 3270 writel(t | STOP_PCI_MASTER, reg); 3271 3272 for (i = 0; i < 1000; i++) { 3273 udelay(1); 3274 t = readl(reg); 3275 if (PCI_MASTER_EMPTY & t) 3276 break; 3277 } 3278 if (!(PCI_MASTER_EMPTY & t)) { 3279 dev_err(host->dev, "PCI master won't flush\n"); 3280 rc = 1; 3281 goto done; 3282 } 3283 3284 /* set reset */ 3285 i = 5; 3286 do { 3287 writel(t | GLOB_SFT_RST, reg); 3288 t = readl(reg); 3289 udelay(1); 3290 } while (!(GLOB_SFT_RST & t) && (i-- > 0)); 3291 3292 if (!(GLOB_SFT_RST & t)) { 3293 dev_err(host->dev, "can't set global reset\n"); 3294 rc = 1; 3295 goto done; 3296 } 3297 3298 /* clear reset and *reenable the PCI master* (not mentioned in spec) */ 3299 i = 5; 3300 do { 3301 writel(t & ~(GLOB_SFT_RST | STOP_PCI_MASTER), reg); 3302 t = readl(reg); 3303 udelay(1); 3304 } while ((GLOB_SFT_RST & t) && (i-- > 0)); 3305 3306 if (GLOB_SFT_RST & t) { 3307 dev_err(host->dev, "can't clear global reset\n"); 3308 rc = 1; 3309 } 3310 done: 3311 return rc; 3312 } 3313 3314 static void mv6_read_preamp(struct mv_host_priv *hpriv, int idx, 3315 void __iomem *mmio) 3316 { 3317 void __iomem *port_mmio; 3318 u32 tmp; 3319 3320 tmp = readl(mmio + RESET_CFG); 3321 if ((tmp & (1 << 0)) == 0) { 3322 hpriv->signal[idx].amps = 0x7 << 8; 3323 hpriv->signal[idx].pre = 0x1 << 5; 3324 return; 3325 } 3326 3327 port_mmio = mv_port_base(mmio, idx); 3328 tmp = readl(port_mmio + PHY_MODE2); 3329 3330 hpriv->signal[idx].amps = tmp & 0x700; /* bits 10:8 */ 3331 hpriv->signal[idx].pre = tmp & 0xe0; /* bits 7:5 */ 3332 } 3333 3334 static void mv6_enable_leds(struct mv_host_priv *hpriv, void __iomem *mmio) 3335 { 3336 writel(0x00000060, mmio + GPIO_PORT_CTL); 3337 } 3338 3339 static void mv6_phy_errata(struct mv_host_priv *hpriv, void __iomem *mmio, 3340 unsigned int port) 3341 { 3342 void __iomem *port_mmio = mv_port_base(mmio, port); 3343 3344 u32 hp_flags = hpriv->hp_flags; 3345 int fix_phy_mode2 = 3346 hp_flags & (MV_HP_ERRATA_60X1B2 | MV_HP_ERRATA_60X1C0); 3347 int fix_phy_mode4 = 3348 hp_flags & (MV_HP_ERRATA_60X1B2 | MV_HP_ERRATA_60X1C0); 3349 u32 m2, m3; 3350 3351 if (fix_phy_mode2) { 3352 m2 = readl(port_mmio + PHY_MODE2); 3353 m2 &= ~(1 << 16); 3354 m2 |= (1 << 31); 3355 writel(m2, port_mmio + PHY_MODE2); 3356 3357 udelay(200); 3358 3359 m2 = readl(port_mmio + PHY_MODE2); 3360 m2 &= ~((1 << 16) | (1 << 31)); 3361 writel(m2, port_mmio + PHY_MODE2); 3362 3363 udelay(200); 3364 } 3365 3366 /* 3367 * Gen-II/IIe PHY_MODE3 errata RM#2: 3368 * Achieves better receiver noise performance than the h/w default: 3369 */ 3370 m3 = readl(port_mmio + PHY_MODE3); 3371 m3 = (m3 & 0x1f) | (0x5555601 << 5); 3372 3373 /* Guideline 88F5182 (GL# SATA-S11) */ 3374 if (IS_SOC(hpriv)) 3375 m3 &= ~0x1c; 3376 3377 if (fix_phy_mode4) { 3378 u32 m4 = readl(port_mmio + PHY_MODE4); 3379 /* 3380 * Enforce reserved-bit restrictions on GenIIe devices only. 3381 * For earlier chipsets, force only the internal config field 3382 * (workaround for errata FEr SATA#10 part 1). 3383 */ 3384 if (IS_GEN_IIE(hpriv)) 3385 m4 = (m4 & ~PHY_MODE4_RSVD_ZEROS) | PHY_MODE4_RSVD_ONES; 3386 else 3387 m4 = (m4 & ~PHY_MODE4_CFG_MASK) | PHY_MODE4_CFG_VALUE; 3388 writel(m4, port_mmio + PHY_MODE4); 3389 } 3390 /* 3391 * Workaround for 60x1-B2 errata SATA#13: 3392 * Any write to PHY_MODE4 (above) may corrupt PHY_MODE3, 3393 * so we must always rewrite PHY_MODE3 after PHY_MODE4. 3394 * Or ensure we use writelfl() when writing PHY_MODE4. 3395 */ 3396 writel(m3, port_mmio + PHY_MODE3); 3397 3398 /* Revert values of pre-emphasis and signal amps to the saved ones */ 3399 m2 = readl(port_mmio + PHY_MODE2); 3400 3401 m2 &= ~MV_M2_PREAMP_MASK; 3402 m2 |= hpriv->signal[port].amps; 3403 m2 |= hpriv->signal[port].pre; 3404 m2 &= ~(1 << 16); 3405 3406 /* according to mvSata 3.6.1, some IIE values are fixed */ 3407 if (IS_GEN_IIE(hpriv)) { 3408 m2 &= ~0xC30FF01F; 3409 m2 |= 0x0000900F; 3410 } 3411 3412 writel(m2, port_mmio + PHY_MODE2); 3413 } 3414 3415 /* TODO: use the generic LED interface to configure the SATA Presence */ 3416 /* & Acitivy LEDs on the board */ 3417 static void mv_soc_enable_leds(struct mv_host_priv *hpriv, 3418 void __iomem *mmio) 3419 { 3420 return; 3421 } 3422 3423 static void mv_soc_read_preamp(struct mv_host_priv *hpriv, int idx, 3424 void __iomem *mmio) 3425 { 3426 void __iomem *port_mmio; 3427 u32 tmp; 3428 3429 port_mmio = mv_port_base(mmio, idx); 3430 tmp = readl(port_mmio + PHY_MODE2); 3431 3432 hpriv->signal[idx].amps = tmp & 0x700; /* bits 10:8 */ 3433 hpriv->signal[idx].pre = tmp & 0xe0; /* bits 7:5 */ 3434 } 3435 3436 #undef ZERO 3437 #define ZERO(reg) writel(0, port_mmio + (reg)) 3438 static void mv_soc_reset_hc_port(struct mv_host_priv *hpriv, 3439 void __iomem *mmio, unsigned int port) 3440 { 3441 void __iomem *port_mmio = mv_port_base(mmio, port); 3442 3443 mv_reset_channel(hpriv, mmio, port); 3444 3445 ZERO(0x028); /* command */ 3446 writel(0x101f, port_mmio + EDMA_CFG); 3447 ZERO(0x004); /* timer */ 3448 ZERO(0x008); /* irq err cause */ 3449 ZERO(0x00c); /* irq err mask */ 3450 ZERO(0x010); /* rq bah */ 3451 ZERO(0x014); /* rq inp */ 3452 ZERO(0x018); /* rq outp */ 3453 ZERO(0x01c); /* respq bah */ 3454 ZERO(0x024); /* respq outp */ 3455 ZERO(0x020); /* respq inp */ 3456 ZERO(0x02c); /* test control */ 3457 writel(0x800, port_mmio + EDMA_IORDY_TMOUT); 3458 } 3459 3460 #undef ZERO 3461 3462 #define ZERO(reg) writel(0, hc_mmio + (reg)) 3463 static void mv_soc_reset_one_hc(struct mv_host_priv *hpriv, 3464 void __iomem *mmio) 3465 { 3466 void __iomem *hc_mmio = mv_hc_base(mmio, 0); 3467 3468 ZERO(0x00c); 3469 ZERO(0x010); 3470 ZERO(0x014); 3471 3472 } 3473 3474 #undef ZERO 3475 3476 static int mv_soc_reset_hc(struct ata_host *host, 3477 void __iomem *mmio, unsigned int n_hc) 3478 { 3479 struct mv_host_priv *hpriv = host->private_data; 3480 unsigned int port; 3481 3482 for (port = 0; port < hpriv->n_ports; port++) 3483 mv_soc_reset_hc_port(hpriv, mmio, port); 3484 3485 mv_soc_reset_one_hc(hpriv, mmio); 3486 3487 return 0; 3488 } 3489 3490 static void mv_soc_reset_flash(struct mv_host_priv *hpriv, 3491 void __iomem *mmio) 3492 { 3493 return; 3494 } 3495 3496 static void mv_soc_reset_bus(struct ata_host *host, void __iomem *mmio) 3497 { 3498 return; 3499 } 3500 3501 static void mv_soc_65n_phy_errata(struct mv_host_priv *hpriv, 3502 void __iomem *mmio, unsigned int port) 3503 { 3504 void __iomem *port_mmio = mv_port_base(mmio, port); 3505 u32 reg; 3506 3507 reg = readl(port_mmio + PHY_MODE3); 3508 reg &= ~(0x3 << 27); /* SELMUPF (bits 28:27) to 1 */ 3509 reg |= (0x1 << 27); 3510 reg &= ~(0x3 << 29); /* SELMUPI (bits 30:29) to 1 */ 3511 reg |= (0x1 << 29); 3512 writel(reg, port_mmio + PHY_MODE3); 3513 3514 reg = readl(port_mmio + PHY_MODE4); 3515 reg &= ~0x1; /* SATU_OD8 (bit 0) to 0, reserved bit 16 must be set */ 3516 reg |= (0x1 << 16); 3517 writel(reg, port_mmio + PHY_MODE4); 3518 3519 reg = readl(port_mmio + PHY_MODE9_GEN2); 3520 reg &= ~0xf; /* TXAMP[3:0] (bits 3:0) to 8 */ 3521 reg |= 0x8; 3522 reg &= ~(0x1 << 14); /* TXAMP[4] (bit 14) to 0 */ 3523 writel(reg, port_mmio + PHY_MODE9_GEN2); 3524 3525 reg = readl(port_mmio + PHY_MODE9_GEN1); 3526 reg &= ~0xf; /* TXAMP[3:0] (bits 3:0) to 8 */ 3527 reg |= 0x8; 3528 reg &= ~(0x1 << 14); /* TXAMP[4] (bit 14) to 0 */ 3529 writel(reg, port_mmio + PHY_MODE9_GEN1); 3530 } 3531 3532 /* 3533 * soc_is_65 - check if the soc is 65 nano device 3534 * 3535 * Detect the type of the SoC, this is done by reading the PHYCFG_OFS 3536 * register, this register should contain non-zero value and it exists only 3537 * in the 65 nano devices, when reading it from older devices we get 0. 3538 */ 3539 static bool soc_is_65n(struct mv_host_priv *hpriv) 3540 { 3541 void __iomem *port0_mmio = mv_port_base(hpriv->base, 0); 3542 3543 if (readl(port0_mmio + PHYCFG_OFS)) 3544 return true; 3545 return false; 3546 } 3547 3548 static void mv_setup_ifcfg(void __iomem *port_mmio, int want_gen2i) 3549 { 3550 u32 ifcfg = readl(port_mmio + SATA_IFCFG); 3551 3552 ifcfg = (ifcfg & 0xf7f) | 0x9b1000; /* from chip spec */ 3553 if (want_gen2i) 3554 ifcfg |= (1 << 7); /* enable gen2i speed */ 3555 writelfl(ifcfg, port_mmio + SATA_IFCFG); 3556 } 3557 3558 static void mv_reset_channel(struct mv_host_priv *hpriv, void __iomem *mmio, 3559 unsigned int port_no) 3560 { 3561 void __iomem *port_mmio = mv_port_base(mmio, port_no); 3562 3563 /* 3564 * The datasheet warns against setting EDMA_RESET when EDMA is active 3565 * (but doesn't say what the problem might be). So we first try 3566 * to disable the EDMA engine before doing the EDMA_RESET operation. 3567 */ 3568 mv_stop_edma_engine(port_mmio); 3569 writelfl(EDMA_RESET, port_mmio + EDMA_CMD); 3570 3571 if (!IS_GEN_I(hpriv)) { 3572 /* Enable 3.0gb/s link speed: this survives EDMA_RESET */ 3573 mv_setup_ifcfg(port_mmio, 1); 3574 } 3575 /* 3576 * Strobing EDMA_RESET here causes a hard reset of the SATA transport, 3577 * link, and physical layers. It resets all SATA interface registers 3578 * (except for SATA_IFCFG), and issues a COMRESET to the dev. 3579 */ 3580 writelfl(EDMA_RESET, port_mmio + EDMA_CMD); 3581 udelay(25); /* allow reset propagation */ 3582 writelfl(0, port_mmio + EDMA_CMD); 3583 3584 hpriv->ops->phy_errata(hpriv, mmio, port_no); 3585 3586 if (IS_GEN_I(hpriv)) 3587 usleep_range(500, 1000); 3588 } 3589 3590 static void mv_pmp_select(struct ata_port *ap, int pmp) 3591 { 3592 if (sata_pmp_supported(ap)) { 3593 void __iomem *port_mmio = mv_ap_base(ap); 3594 u32 reg = readl(port_mmio + SATA_IFCTL); 3595 int old = reg & 0xf; 3596 3597 if (old != pmp) { 3598 reg = (reg & ~0xf) | pmp; 3599 writelfl(reg, port_mmio + SATA_IFCTL); 3600 } 3601 } 3602 } 3603 3604 static int mv_pmp_hardreset(struct ata_link *link, unsigned int *class, 3605 unsigned long deadline) 3606 { 3607 mv_pmp_select(link->ap, sata_srst_pmp(link)); 3608 return sata_std_hardreset(link, class, deadline); 3609 } 3610 3611 static int mv_softreset(struct ata_link *link, unsigned int *class, 3612 unsigned long deadline) 3613 { 3614 mv_pmp_select(link->ap, sata_srst_pmp(link)); 3615 return ata_sff_softreset(link, class, deadline); 3616 } 3617 3618 static int mv_hardreset(struct ata_link *link, unsigned int *class, 3619 unsigned long deadline) 3620 { 3621 struct ata_port *ap = link->ap; 3622 struct mv_host_priv *hpriv = ap->host->private_data; 3623 struct mv_port_priv *pp = ap->private_data; 3624 void __iomem *mmio = hpriv->base; 3625 int rc, attempts = 0, extra = 0; 3626 u32 sstatus; 3627 bool online; 3628 3629 mv_reset_channel(hpriv, mmio, ap->port_no); 3630 pp->pp_flags &= ~MV_PP_FLAG_EDMA_EN; 3631 pp->pp_flags &= 3632 ~(MV_PP_FLAG_FBS_EN | MV_PP_FLAG_NCQ_EN | MV_PP_FLAG_FAKE_ATA_BUSY); 3633 3634 /* Workaround for errata FEr SATA#10 (part 2) */ 3635 do { 3636 const unsigned long *timing = 3637 sata_ehc_deb_timing(&link->eh_context); 3638 3639 rc = sata_link_hardreset(link, timing, deadline + extra, 3640 &online, NULL); 3641 rc = online ? -EAGAIN : rc; 3642 if (rc) 3643 return rc; 3644 sata_scr_read(link, SCR_STATUS, &sstatus); 3645 if (!IS_GEN_I(hpriv) && ++attempts >= 5 && sstatus == 0x121) { 3646 /* Force 1.5gb/s link speed and try again */ 3647 mv_setup_ifcfg(mv_ap_base(ap), 0); 3648 if (time_after(jiffies + HZ, deadline)) 3649 extra = HZ; /* only extend it once, max */ 3650 } 3651 } while (sstatus != 0x0 && sstatus != 0x113 && sstatus != 0x123); 3652 mv_save_cached_regs(ap); 3653 mv_edma_cfg(ap, 0, 0); 3654 3655 return rc; 3656 } 3657 3658 static void mv_eh_freeze(struct ata_port *ap) 3659 { 3660 mv_stop_edma(ap); 3661 mv_enable_port_irqs(ap, 0); 3662 } 3663 3664 static void mv_eh_thaw(struct ata_port *ap) 3665 { 3666 struct mv_host_priv *hpriv = ap->host->private_data; 3667 unsigned int port = ap->port_no; 3668 unsigned int hardport = mv_hardport_from_port(port); 3669 void __iomem *hc_mmio = mv_hc_base_from_port(hpriv->base, port); 3670 void __iomem *port_mmio = mv_ap_base(ap); 3671 u32 hc_irq_cause; 3672 3673 /* clear EDMA errors on this port */ 3674 writel(0, port_mmio + EDMA_ERR_IRQ_CAUSE); 3675 3676 /* clear pending irq events */ 3677 hc_irq_cause = ~((DEV_IRQ | DMA_IRQ) << hardport); 3678 writelfl(hc_irq_cause, hc_mmio + HC_IRQ_CAUSE); 3679 3680 mv_enable_port_irqs(ap, ERR_IRQ); 3681 } 3682 3683 /** 3684 * mv_port_init - Perform some early initialization on a single port. 3685 * @port: libata data structure storing shadow register addresses 3686 * @port_mmio: base address of the port 3687 * 3688 * Initialize shadow register mmio addresses, clear outstanding 3689 * interrupts on the port, and unmask interrupts for the future 3690 * start of the port. 3691 * 3692 * LOCKING: 3693 * Inherited from caller. 3694 */ 3695 static void mv_port_init(struct ata_ioports *port, void __iomem *port_mmio) 3696 { 3697 void __iomem *serr, *shd_base = port_mmio + SHD_BLK; 3698 3699 /* PIO related setup 3700 */ 3701 port->data_addr = shd_base + (sizeof(u32) * ATA_REG_DATA); 3702 port->error_addr = 3703 port->feature_addr = shd_base + (sizeof(u32) * ATA_REG_ERR); 3704 port->nsect_addr = shd_base + (sizeof(u32) * ATA_REG_NSECT); 3705 port->lbal_addr = shd_base + (sizeof(u32) * ATA_REG_LBAL); 3706 port->lbam_addr = shd_base + (sizeof(u32) * ATA_REG_LBAM); 3707 port->lbah_addr = shd_base + (sizeof(u32) * ATA_REG_LBAH); 3708 port->device_addr = shd_base + (sizeof(u32) * ATA_REG_DEVICE); 3709 port->status_addr = 3710 port->command_addr = shd_base + (sizeof(u32) * ATA_REG_STATUS); 3711 /* special case: control/altstatus doesn't have ATA_REG_ address */ 3712 port->altstatus_addr = port->ctl_addr = shd_base + SHD_CTL_AST; 3713 3714 /* Clear any currently outstanding port interrupt conditions */ 3715 serr = port_mmio + mv_scr_offset(SCR_ERROR); 3716 writelfl(readl(serr), serr); 3717 writelfl(0, port_mmio + EDMA_ERR_IRQ_CAUSE); 3718 3719 /* unmask all non-transient EDMA error interrupts */ 3720 writelfl(~EDMA_ERR_IRQ_TRANSIENT, port_mmio + EDMA_ERR_IRQ_MASK); 3721 } 3722 3723 static unsigned int mv_in_pcix_mode(struct ata_host *host) 3724 { 3725 struct mv_host_priv *hpriv = host->private_data; 3726 void __iomem *mmio = hpriv->base; 3727 u32 reg; 3728 3729 if (IS_SOC(hpriv) || !IS_PCIE(hpriv)) 3730 return 0; /* not PCI-X capable */ 3731 reg = readl(mmio + MV_PCI_MODE); 3732 if ((reg & MV_PCI_MODE_MASK) == 0) 3733 return 0; /* conventional PCI mode */ 3734 return 1; /* chip is in PCI-X mode */ 3735 } 3736 3737 static int mv_pci_cut_through_okay(struct ata_host *host) 3738 { 3739 struct mv_host_priv *hpriv = host->private_data; 3740 void __iomem *mmio = hpriv->base; 3741 u32 reg; 3742 3743 if (!mv_in_pcix_mode(host)) { 3744 reg = readl(mmio + MV_PCI_COMMAND); 3745 if (reg & MV_PCI_COMMAND_MRDTRIG) 3746 return 0; /* not okay */ 3747 } 3748 return 1; /* okay */ 3749 } 3750 3751 static void mv_60x1b2_errata_pci7(struct ata_host *host) 3752 { 3753 struct mv_host_priv *hpriv = host->private_data; 3754 void __iomem *mmio = hpriv->base; 3755 3756 /* workaround for 60x1-B2 errata PCI#7 */ 3757 if (mv_in_pcix_mode(host)) { 3758 u32 reg = readl(mmio + MV_PCI_COMMAND); 3759 writelfl(reg & ~MV_PCI_COMMAND_MWRCOM, mmio + MV_PCI_COMMAND); 3760 } 3761 } 3762 3763 static int mv_chip_id(struct ata_host *host, unsigned int board_idx) 3764 { 3765 struct pci_dev *pdev = to_pci_dev(host->dev); 3766 struct mv_host_priv *hpriv = host->private_data; 3767 u32 hp_flags = hpriv->hp_flags; 3768 3769 switch (board_idx) { 3770 case chip_5080: 3771 hpriv->ops = &mv5xxx_ops; 3772 hp_flags |= MV_HP_GEN_I; 3773 3774 switch (pdev->revision) { 3775 case 0x1: 3776 hp_flags |= MV_HP_ERRATA_50XXB0; 3777 break; 3778 case 0x3: 3779 hp_flags |= MV_HP_ERRATA_50XXB2; 3780 break; 3781 default: 3782 dev_warn(&pdev->dev, 3783 "Applying 50XXB2 workarounds to unknown rev\n"); 3784 hp_flags |= MV_HP_ERRATA_50XXB2; 3785 break; 3786 } 3787 break; 3788 3789 case chip_504x: 3790 case chip_508x: 3791 hpriv->ops = &mv5xxx_ops; 3792 hp_flags |= MV_HP_GEN_I; 3793 3794 switch (pdev->revision) { 3795 case 0x0: 3796 hp_flags |= MV_HP_ERRATA_50XXB0; 3797 break; 3798 case 0x3: 3799 hp_flags |= MV_HP_ERRATA_50XXB2; 3800 break; 3801 default: 3802 dev_warn(&pdev->dev, 3803 "Applying B2 workarounds to unknown rev\n"); 3804 hp_flags |= MV_HP_ERRATA_50XXB2; 3805 break; 3806 } 3807 break; 3808 3809 case chip_604x: 3810 case chip_608x: 3811 hpriv->ops = &mv6xxx_ops; 3812 hp_flags |= MV_HP_GEN_II; 3813 3814 switch (pdev->revision) { 3815 case 0x7: 3816 mv_60x1b2_errata_pci7(host); 3817 hp_flags |= MV_HP_ERRATA_60X1B2; 3818 break; 3819 case 0x9: 3820 hp_flags |= MV_HP_ERRATA_60X1C0; 3821 break; 3822 default: 3823 dev_warn(&pdev->dev, 3824 "Applying B2 workarounds to unknown rev\n"); 3825 hp_flags |= MV_HP_ERRATA_60X1B2; 3826 break; 3827 } 3828 break; 3829 3830 case chip_7042: 3831 hp_flags |= MV_HP_PCIE | MV_HP_CUT_THROUGH; 3832 if (pdev->vendor == PCI_VENDOR_ID_TTI && 3833 (pdev->device == 0x2300 || pdev->device == 0x2310)) 3834 { 3835 /* 3836 * Highpoint RocketRAID PCIe 23xx series cards: 3837 * 3838 * Unconfigured drives are treated as "Legacy" 3839 * by the BIOS, and it overwrites sector 8 with 3840 * a "Lgcy" metadata block prior to Linux boot. 3841 * 3842 * Configured drives (RAID or JBOD) leave sector 8 3843 * alone, but instead overwrite a high numbered 3844 * sector for the RAID metadata. This sector can 3845 * be determined exactly, by truncating the physical 3846 * drive capacity to a nice even GB value. 3847 * 3848 * RAID metadata is at: (dev->n_sectors & ~0xfffff) 3849 * 3850 * Warn the user, lest they think we're just buggy. 3851 */ 3852 dev_warn(&pdev->dev, "Highpoint RocketRAID" 3853 " BIOS CORRUPTS DATA on all attached drives," 3854 " regardless of if/how they are configured." 3855 " BEWARE!\n"); 3856 dev_warn(&pdev->dev, "For data safety, do not" 3857 " use sectors 8-9 on \"Legacy\" drives," 3858 " and avoid the final two gigabytes on" 3859 " all RocketRAID BIOS initialized drives.\n"); 3860 } 3861 fallthrough; 3862 case chip_6042: 3863 hpriv->ops = &mv6xxx_ops; 3864 hp_flags |= MV_HP_GEN_IIE; 3865 if (board_idx == chip_6042 && mv_pci_cut_through_okay(host)) 3866 hp_flags |= MV_HP_CUT_THROUGH; 3867 3868 switch (pdev->revision) { 3869 case 0x2: /* Rev.B0: the first/only public release */ 3870 hp_flags |= MV_HP_ERRATA_60X1C0; 3871 break; 3872 default: 3873 dev_warn(&pdev->dev, 3874 "Applying 60X1C0 workarounds to unknown rev\n"); 3875 hp_flags |= MV_HP_ERRATA_60X1C0; 3876 break; 3877 } 3878 break; 3879 case chip_soc: 3880 if (soc_is_65n(hpriv)) 3881 hpriv->ops = &mv_soc_65n_ops; 3882 else 3883 hpriv->ops = &mv_soc_ops; 3884 hp_flags |= MV_HP_FLAG_SOC | MV_HP_GEN_IIE | 3885 MV_HP_ERRATA_60X1C0; 3886 break; 3887 3888 default: 3889 dev_alert(host->dev, "BUG: invalid board index %u\n", board_idx); 3890 return -EINVAL; 3891 } 3892 3893 hpriv->hp_flags = hp_flags; 3894 if (hp_flags & MV_HP_PCIE) { 3895 hpriv->irq_cause_offset = PCIE_IRQ_CAUSE; 3896 hpriv->irq_mask_offset = PCIE_IRQ_MASK; 3897 hpriv->unmask_all_irqs = PCIE_UNMASK_ALL_IRQS; 3898 } else { 3899 hpriv->irq_cause_offset = PCI_IRQ_CAUSE; 3900 hpriv->irq_mask_offset = PCI_IRQ_MASK; 3901 hpriv->unmask_all_irqs = PCI_UNMASK_ALL_IRQS; 3902 } 3903 3904 return 0; 3905 } 3906 3907 /** 3908 * mv_init_host - Perform some early initialization of the host. 3909 * @host: ATA host to initialize 3910 * 3911 * If possible, do an early global reset of the host. Then do 3912 * our port init and clear/unmask all/relevant host interrupts. 3913 * 3914 * LOCKING: 3915 * Inherited from caller. 3916 */ 3917 static int mv_init_host(struct ata_host *host) 3918 { 3919 int rc = 0, n_hc, port, hc; 3920 struct mv_host_priv *hpriv = host->private_data; 3921 void __iomem *mmio = hpriv->base; 3922 3923 rc = mv_chip_id(host, hpriv->board_idx); 3924 if (rc) 3925 goto done; 3926 3927 if (IS_SOC(hpriv)) { 3928 hpriv->main_irq_cause_addr = mmio + SOC_HC_MAIN_IRQ_CAUSE; 3929 hpriv->main_irq_mask_addr = mmio + SOC_HC_MAIN_IRQ_MASK; 3930 } else { 3931 hpriv->main_irq_cause_addr = mmio + PCI_HC_MAIN_IRQ_CAUSE; 3932 hpriv->main_irq_mask_addr = mmio + PCI_HC_MAIN_IRQ_MASK; 3933 } 3934 3935 /* initialize shadow irq mask with register's value */ 3936 hpriv->main_irq_mask = readl(hpriv->main_irq_mask_addr); 3937 3938 /* global interrupt mask: 0 == mask everything */ 3939 mv_set_main_irq_mask(host, ~0, 0); 3940 3941 n_hc = mv_get_hc_count(host->ports[0]->flags); 3942 3943 for (port = 0; port < host->n_ports; port++) 3944 if (hpriv->ops->read_preamp) 3945 hpriv->ops->read_preamp(hpriv, port, mmio); 3946 3947 rc = hpriv->ops->reset_hc(host, mmio, n_hc); 3948 if (rc) 3949 goto done; 3950 3951 hpriv->ops->reset_flash(hpriv, mmio); 3952 hpriv->ops->reset_bus(host, mmio); 3953 hpriv->ops->enable_leds(hpriv, mmio); 3954 3955 for (port = 0; port < host->n_ports; port++) { 3956 struct ata_port *ap = host->ports[port]; 3957 void __iomem *port_mmio = mv_port_base(mmio, port); 3958 3959 mv_port_init(&ap->ioaddr, port_mmio); 3960 } 3961 3962 for (hc = 0; hc < n_hc; hc++) { 3963 void __iomem *hc_mmio = mv_hc_base(mmio, hc); 3964 3965 dev_dbg(host->dev, "HC%i: HC config=0x%08x HC IRQ cause " 3966 "(before clear)=0x%08x\n", hc, 3967 readl(hc_mmio + HC_CFG), 3968 readl(hc_mmio + HC_IRQ_CAUSE)); 3969 3970 /* Clear any currently outstanding hc interrupt conditions */ 3971 writelfl(0, hc_mmio + HC_IRQ_CAUSE); 3972 } 3973 3974 if (!IS_SOC(hpriv)) { 3975 /* Clear any currently outstanding host interrupt conditions */ 3976 writelfl(0, mmio + hpriv->irq_cause_offset); 3977 3978 /* and unmask interrupt generation for host regs */ 3979 writelfl(hpriv->unmask_all_irqs, mmio + hpriv->irq_mask_offset); 3980 } 3981 3982 /* 3983 * enable only global host interrupts for now. 3984 * The per-port interrupts get done later as ports are set up. 3985 */ 3986 mv_set_main_irq_mask(host, 0, PCI_ERR); 3987 mv_set_irq_coalescing(host, irq_coalescing_io_count, 3988 irq_coalescing_usecs); 3989 done: 3990 return rc; 3991 } 3992 3993 static int mv_create_dma_pools(struct mv_host_priv *hpriv, struct device *dev) 3994 { 3995 hpriv->crqb_pool = dmam_pool_create("crqb_q", dev, MV_CRQB_Q_SZ, 3996 MV_CRQB_Q_SZ, 0); 3997 if (!hpriv->crqb_pool) 3998 return -ENOMEM; 3999 4000 hpriv->crpb_pool = dmam_pool_create("crpb_q", dev, MV_CRPB_Q_SZ, 4001 MV_CRPB_Q_SZ, 0); 4002 if (!hpriv->crpb_pool) 4003 return -ENOMEM; 4004 4005 hpriv->sg_tbl_pool = dmam_pool_create("sg_tbl", dev, MV_SG_TBL_SZ, 4006 MV_SG_TBL_SZ, 0); 4007 if (!hpriv->sg_tbl_pool) 4008 return -ENOMEM; 4009 4010 return 0; 4011 } 4012 4013 static void mv_conf_mbus_windows(struct mv_host_priv *hpriv, 4014 const struct mbus_dram_target_info *dram) 4015 { 4016 int i; 4017 4018 for (i = 0; i < 4; i++) { 4019 writel(0, hpriv->base + WINDOW_CTRL(i)); 4020 writel(0, hpriv->base + WINDOW_BASE(i)); 4021 } 4022 4023 for (i = 0; i < dram->num_cs; i++) { 4024 const struct mbus_dram_window *cs = dram->cs + i; 4025 4026 writel(((cs->size - 1) & 0xffff0000) | 4027 (cs->mbus_attr << 8) | 4028 (dram->mbus_dram_target_id << 4) | 1, 4029 hpriv->base + WINDOW_CTRL(i)); 4030 writel(cs->base, hpriv->base + WINDOW_BASE(i)); 4031 } 4032 } 4033 4034 /** 4035 * mv_platform_probe - handle a positive probe of an soc Marvell 4036 * host 4037 * @pdev: platform device found 4038 * 4039 * LOCKING: 4040 * Inherited from caller. 4041 */ 4042 static int mv_platform_probe(struct platform_device *pdev) 4043 { 4044 const struct mv_sata_platform_data *mv_platform_data; 4045 const struct mbus_dram_target_info *dram; 4046 const struct ata_port_info *ppi[] = 4047 { &mv_port_info[chip_soc], NULL }; 4048 struct ata_host *host; 4049 struct mv_host_priv *hpriv; 4050 struct resource *res; 4051 int n_ports = 0, irq = 0; 4052 int rc; 4053 int port; 4054 4055 ata_print_version_once(&pdev->dev, DRV_VERSION); 4056 4057 /* 4058 * Simple resource validation .. 4059 */ 4060 if (unlikely(pdev->num_resources != 1)) { 4061 dev_err(&pdev->dev, "invalid number of resources\n"); 4062 return -EINVAL; 4063 } 4064 4065 /* 4066 * Get the register base first 4067 */ 4068 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 4069 if (res == NULL) 4070 return -EINVAL; 4071 4072 /* allocate host */ 4073 if (pdev->dev.of_node) { 4074 rc = of_property_read_u32(pdev->dev.of_node, "nr-ports", 4075 &n_ports); 4076 if (rc) { 4077 dev_err(&pdev->dev, 4078 "error parsing nr-ports property: %d\n", rc); 4079 return rc; 4080 } 4081 4082 if (n_ports <= 0) { 4083 dev_err(&pdev->dev, "nr-ports must be positive: %d\n", 4084 n_ports); 4085 return -EINVAL; 4086 } 4087 4088 irq = irq_of_parse_and_map(pdev->dev.of_node, 0); 4089 } else { 4090 mv_platform_data = dev_get_platdata(&pdev->dev); 4091 n_ports = mv_platform_data->n_ports; 4092 irq = platform_get_irq(pdev, 0); 4093 } 4094 if (irq < 0) 4095 return irq; 4096 if (!irq) 4097 return -EINVAL; 4098 4099 host = ata_host_alloc_pinfo(&pdev->dev, ppi, n_ports); 4100 hpriv = devm_kzalloc(&pdev->dev, sizeof(*hpriv), GFP_KERNEL); 4101 4102 if (!host || !hpriv) 4103 return -ENOMEM; 4104 hpriv->port_clks = devm_kcalloc(&pdev->dev, 4105 n_ports, sizeof(struct clk *), 4106 GFP_KERNEL); 4107 if (!hpriv->port_clks) 4108 return -ENOMEM; 4109 hpriv->port_phys = devm_kcalloc(&pdev->dev, 4110 n_ports, sizeof(struct phy *), 4111 GFP_KERNEL); 4112 if (!hpriv->port_phys) 4113 return -ENOMEM; 4114 host->private_data = hpriv; 4115 hpriv->board_idx = chip_soc; 4116 4117 host->iomap = NULL; 4118 hpriv->base = devm_ioremap(&pdev->dev, res->start, 4119 resource_size(res)); 4120 if (!hpriv->base) 4121 return -ENOMEM; 4122 4123 hpriv->base -= SATAHC0_REG_BASE; 4124 4125 hpriv->clk = clk_get(&pdev->dev, NULL); 4126 if (IS_ERR(hpriv->clk)) 4127 dev_notice(&pdev->dev, "cannot get optional clkdev\n"); 4128 else 4129 clk_prepare_enable(hpriv->clk); 4130 4131 for (port = 0; port < n_ports; port++) { 4132 char port_number[16]; 4133 sprintf(port_number, "%d", port); 4134 hpriv->port_clks[port] = clk_get(&pdev->dev, port_number); 4135 if (!IS_ERR(hpriv->port_clks[port])) 4136 clk_prepare_enable(hpriv->port_clks[port]); 4137 4138 sprintf(port_number, "port%d", port); 4139 hpriv->port_phys[port] = devm_phy_optional_get(&pdev->dev, 4140 port_number); 4141 if (IS_ERR(hpriv->port_phys[port])) { 4142 rc = PTR_ERR(hpriv->port_phys[port]); 4143 hpriv->port_phys[port] = NULL; 4144 if (rc != -EPROBE_DEFER) 4145 dev_warn(&pdev->dev, "error getting phy %d", rc); 4146 4147 /* Cleanup only the initialized ports */ 4148 hpriv->n_ports = port; 4149 goto err; 4150 } else 4151 phy_power_on(hpriv->port_phys[port]); 4152 } 4153 4154 /* All the ports have been initialized */ 4155 hpriv->n_ports = n_ports; 4156 4157 /* 4158 * (Re-)program MBUS remapping windows if we are asked to. 4159 */ 4160 dram = mv_mbus_dram_info(); 4161 if (dram) 4162 mv_conf_mbus_windows(hpriv, dram); 4163 4164 rc = mv_create_dma_pools(hpriv, &pdev->dev); 4165 if (rc) 4166 goto err; 4167 4168 /* 4169 * To allow disk hotplug on Armada 370/XP SoCs, the PHY speed must be 4170 * updated in the LP_PHY_CTL register. 4171 */ 4172 if (pdev->dev.of_node && 4173 of_device_is_compatible(pdev->dev.of_node, 4174 "marvell,armada-370-sata")) 4175 hpriv->hp_flags |= MV_HP_FIX_LP_PHY_CTL; 4176 4177 /* initialize adapter */ 4178 rc = mv_init_host(host); 4179 if (rc) 4180 goto err; 4181 4182 dev_info(&pdev->dev, "slots %u ports %d\n", 4183 (unsigned)MV_MAX_Q_DEPTH, host->n_ports); 4184 4185 rc = ata_host_activate(host, irq, mv_interrupt, IRQF_SHARED, &mv6_sht); 4186 if (!rc) 4187 return 0; 4188 4189 err: 4190 if (!IS_ERR(hpriv->clk)) { 4191 clk_disable_unprepare(hpriv->clk); 4192 clk_put(hpriv->clk); 4193 } 4194 for (port = 0; port < hpriv->n_ports; port++) { 4195 if (!IS_ERR(hpriv->port_clks[port])) { 4196 clk_disable_unprepare(hpriv->port_clks[port]); 4197 clk_put(hpriv->port_clks[port]); 4198 } 4199 phy_power_off(hpriv->port_phys[port]); 4200 } 4201 4202 return rc; 4203 } 4204 4205 /* 4206 * 4207 * mv_platform_remove - unplug a platform interface 4208 * @pdev: platform device 4209 * 4210 * A platform bus SATA device has been unplugged. Perform the needed 4211 * cleanup. Also called on module unload for any active devices. 4212 */ 4213 static int mv_platform_remove(struct platform_device *pdev) 4214 { 4215 struct ata_host *host = platform_get_drvdata(pdev); 4216 struct mv_host_priv *hpriv = host->private_data; 4217 int port; 4218 ata_host_detach(host); 4219 4220 if (!IS_ERR(hpriv->clk)) { 4221 clk_disable_unprepare(hpriv->clk); 4222 clk_put(hpriv->clk); 4223 } 4224 for (port = 0; port < host->n_ports; port++) { 4225 if (!IS_ERR(hpriv->port_clks[port])) { 4226 clk_disable_unprepare(hpriv->port_clks[port]); 4227 clk_put(hpriv->port_clks[port]); 4228 } 4229 phy_power_off(hpriv->port_phys[port]); 4230 } 4231 return 0; 4232 } 4233 4234 #ifdef CONFIG_PM_SLEEP 4235 static int mv_platform_suspend(struct platform_device *pdev, pm_message_t state) 4236 { 4237 struct ata_host *host = platform_get_drvdata(pdev); 4238 4239 if (host) 4240 ata_host_suspend(host, state); 4241 return 0; 4242 } 4243 4244 static int mv_platform_resume(struct platform_device *pdev) 4245 { 4246 struct ata_host *host = platform_get_drvdata(pdev); 4247 const struct mbus_dram_target_info *dram; 4248 int ret; 4249 4250 if (host) { 4251 struct mv_host_priv *hpriv = host->private_data; 4252 4253 /* 4254 * (Re-)program MBUS remapping windows if we are asked to. 4255 */ 4256 dram = mv_mbus_dram_info(); 4257 if (dram) 4258 mv_conf_mbus_windows(hpriv, dram); 4259 4260 /* initialize adapter */ 4261 ret = mv_init_host(host); 4262 if (ret) { 4263 dev_err(&pdev->dev, "Error during HW init\n"); 4264 return ret; 4265 } 4266 ata_host_resume(host); 4267 } 4268 4269 return 0; 4270 } 4271 #else 4272 #define mv_platform_suspend NULL 4273 #define mv_platform_resume NULL 4274 #endif 4275 4276 #ifdef CONFIG_OF 4277 static const struct of_device_id mv_sata_dt_ids[] = { 4278 { .compatible = "marvell,armada-370-sata", }, 4279 { .compatible = "marvell,orion-sata", }, 4280 { /* sentinel */ } 4281 }; 4282 MODULE_DEVICE_TABLE(of, mv_sata_dt_ids); 4283 #endif 4284 4285 static struct platform_driver mv_platform_driver = { 4286 .probe = mv_platform_probe, 4287 .remove = mv_platform_remove, 4288 .suspend = mv_platform_suspend, 4289 .resume = mv_platform_resume, 4290 .driver = { 4291 .name = DRV_NAME, 4292 .of_match_table = of_match_ptr(mv_sata_dt_ids), 4293 }, 4294 }; 4295 4296 4297 #ifdef CONFIG_PCI 4298 static int mv_pci_init_one(struct pci_dev *pdev, 4299 const struct pci_device_id *ent); 4300 #ifdef CONFIG_PM_SLEEP 4301 static int mv_pci_device_resume(struct pci_dev *pdev); 4302 #endif 4303 4304 4305 static struct pci_driver mv_pci_driver = { 4306 .name = DRV_NAME, 4307 .id_table = mv_pci_tbl, 4308 .probe = mv_pci_init_one, 4309 .remove = ata_pci_remove_one, 4310 #ifdef CONFIG_PM_SLEEP 4311 .suspend = ata_pci_device_suspend, 4312 .resume = mv_pci_device_resume, 4313 #endif 4314 4315 }; 4316 4317 /** 4318 * mv_print_info - Dump key info to kernel log for perusal. 4319 * @host: ATA host to print info about 4320 * 4321 * FIXME: complete this. 4322 * 4323 * LOCKING: 4324 * Inherited from caller. 4325 */ 4326 static void mv_print_info(struct ata_host *host) 4327 { 4328 struct pci_dev *pdev = to_pci_dev(host->dev); 4329 struct mv_host_priv *hpriv = host->private_data; 4330 u8 scc; 4331 const char *scc_s, *gen; 4332 4333 /* Use this to determine the HW stepping of the chip so we know 4334 * what errata to workaround 4335 */ 4336 pci_read_config_byte(pdev, PCI_CLASS_DEVICE, &scc); 4337 if (scc == 0) 4338 scc_s = "SCSI"; 4339 else if (scc == 0x01) 4340 scc_s = "RAID"; 4341 else 4342 scc_s = "?"; 4343 4344 if (IS_GEN_I(hpriv)) 4345 gen = "I"; 4346 else if (IS_GEN_II(hpriv)) 4347 gen = "II"; 4348 else if (IS_GEN_IIE(hpriv)) 4349 gen = "IIE"; 4350 else 4351 gen = "?"; 4352 4353 dev_info(&pdev->dev, "Gen-%s %u slots %u ports %s mode IRQ via %s\n", 4354 gen, (unsigned)MV_MAX_Q_DEPTH, host->n_ports, 4355 scc_s, (MV_HP_FLAG_MSI & hpriv->hp_flags) ? "MSI" : "INTx"); 4356 } 4357 4358 /** 4359 * mv_pci_init_one - handle a positive probe of a PCI Marvell host 4360 * @pdev: PCI device found 4361 * @ent: PCI device ID entry for the matched host 4362 * 4363 * LOCKING: 4364 * Inherited from caller. 4365 */ 4366 static int mv_pci_init_one(struct pci_dev *pdev, 4367 const struct pci_device_id *ent) 4368 { 4369 unsigned int board_idx = (unsigned int)ent->driver_data; 4370 const struct ata_port_info *ppi[] = { &mv_port_info[board_idx], NULL }; 4371 struct ata_host *host; 4372 struct mv_host_priv *hpriv; 4373 int n_ports, port, rc; 4374 4375 ata_print_version_once(&pdev->dev, DRV_VERSION); 4376 4377 /* allocate host */ 4378 n_ports = mv_get_hc_count(ppi[0]->flags) * MV_PORTS_PER_HC; 4379 4380 host = ata_host_alloc_pinfo(&pdev->dev, ppi, n_ports); 4381 hpriv = devm_kzalloc(&pdev->dev, sizeof(*hpriv), GFP_KERNEL); 4382 if (!host || !hpriv) 4383 return -ENOMEM; 4384 host->private_data = hpriv; 4385 hpriv->n_ports = n_ports; 4386 hpriv->board_idx = board_idx; 4387 4388 /* acquire resources */ 4389 rc = pcim_enable_device(pdev); 4390 if (rc) 4391 return rc; 4392 4393 rc = pcim_iomap_regions(pdev, 1 << MV_PRIMARY_BAR, DRV_NAME); 4394 if (rc == -EBUSY) 4395 pcim_pin_device(pdev); 4396 if (rc) 4397 return rc; 4398 host->iomap = pcim_iomap_table(pdev); 4399 hpriv->base = host->iomap[MV_PRIMARY_BAR]; 4400 4401 rc = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64)); 4402 if (rc) { 4403 dev_err(&pdev->dev, "DMA enable failed\n"); 4404 return rc; 4405 } 4406 4407 rc = mv_create_dma_pools(hpriv, &pdev->dev); 4408 if (rc) 4409 return rc; 4410 4411 for (port = 0; port < host->n_ports; port++) { 4412 struct ata_port *ap = host->ports[port]; 4413 void __iomem *port_mmio = mv_port_base(hpriv->base, port); 4414 unsigned int offset = port_mmio - hpriv->base; 4415 4416 ata_port_pbar_desc(ap, MV_PRIMARY_BAR, -1, "mmio"); 4417 ata_port_pbar_desc(ap, MV_PRIMARY_BAR, offset, "port"); 4418 } 4419 4420 /* initialize adapter */ 4421 rc = mv_init_host(host); 4422 if (rc) 4423 return rc; 4424 4425 /* Enable message-switched interrupts, if requested */ 4426 if (msi && pci_enable_msi(pdev) == 0) 4427 hpriv->hp_flags |= MV_HP_FLAG_MSI; 4428 4429 mv_dump_pci_cfg(pdev, 0x68); 4430 mv_print_info(host); 4431 4432 pci_set_master(pdev); 4433 pci_try_set_mwi(pdev); 4434 return ata_host_activate(host, pdev->irq, mv_interrupt, IRQF_SHARED, 4435 IS_GEN_I(hpriv) ? &mv5_sht : &mv6_sht); 4436 } 4437 4438 #ifdef CONFIG_PM_SLEEP 4439 static int mv_pci_device_resume(struct pci_dev *pdev) 4440 { 4441 struct ata_host *host = pci_get_drvdata(pdev); 4442 int rc; 4443 4444 rc = ata_pci_device_do_resume(pdev); 4445 if (rc) 4446 return rc; 4447 4448 /* initialize adapter */ 4449 rc = mv_init_host(host); 4450 if (rc) 4451 return rc; 4452 4453 ata_host_resume(host); 4454 4455 return 0; 4456 } 4457 #endif 4458 #endif 4459 4460 static int __init mv_init(void) 4461 { 4462 int rc = -ENODEV; 4463 #ifdef CONFIG_PCI 4464 rc = pci_register_driver(&mv_pci_driver); 4465 if (rc < 0) 4466 return rc; 4467 #endif 4468 rc = platform_driver_register(&mv_platform_driver); 4469 4470 #ifdef CONFIG_PCI 4471 if (rc < 0) 4472 pci_unregister_driver(&mv_pci_driver); 4473 #endif 4474 return rc; 4475 } 4476 4477 static void __exit mv_exit(void) 4478 { 4479 #ifdef CONFIG_PCI 4480 pci_unregister_driver(&mv_pci_driver); 4481 #endif 4482 platform_driver_unregister(&mv_platform_driver); 4483 } 4484 4485 MODULE_AUTHOR("Brett Russ"); 4486 MODULE_DESCRIPTION("SCSI low-level driver for Marvell SATA controllers"); 4487 MODULE_LICENSE("GPL v2"); 4488 MODULE_DEVICE_TABLE(pci, mv_pci_tbl); 4489 MODULE_VERSION(DRV_VERSION); 4490 MODULE_ALIAS("platform:" DRV_NAME); 4491 4492 module_init(mv_init); 4493 module_exit(mv_exit); 4494