1// SPDX-License-Identifier: GPL-2.0-or-later 2/* 3 * sata_nv.c - NVIDIA nForce SATA 4 * 5 * Copyright 2004 NVIDIA Corp. All rights reserved. 6 * Copyright 2004 Andrew Chew 7 * 8 * libata documentation is available via 'make {ps|pdf}docs', 9 * as Documentation/driver-api/libata.rst 10 * 11 * No hardware documentation available outside of NVIDIA. 12 * This driver programs the NVIDIA SATA controller in a similar 13 * fashion as with other PCI IDE BMDMA controllers, with a few 14 * NV-specific details such as register offsets, SATA phy location, 15 * hotplug info, etc. 16 * 17 * CK804/MCP04 controllers support an alternate programming interface 18 * similar to the ADMA specification (with some modifications). 19 * This allows the use of NCQ. Non-DMA-mapped ATA commands are still 20 * sent through the legacy interface. 21 */ 22 23#include <linux/kernel.h> 24#include <linux/module.h> 25#include <linux/gfp.h> 26#include <linux/pci.h> 27#include <linux/blkdev.h> 28#include <linux/delay.h> 29#include <linux/interrupt.h> 30#include <linux/device.h> 31#include <scsi/scsi_host.h> 32#include <scsi/scsi_device.h> 33#include <linux/libata.h> 34#include <trace/events/libata.h> 35 36#define DRV_NAME "sata_nv" 37#define DRV_VERSION "3.5" 38 39#define NV_ADMA_DMA_BOUNDARY 0xffffffffUL 40 41enum { 42 NV_MMIO_BAR = 5, 43 44 NV_PORTS = 2, 45 NV_PIO_MASK = ATA_PIO4, 46 NV_MWDMA_MASK = ATA_MWDMA2, 47 NV_UDMA_MASK = ATA_UDMA6, 48 NV_PORT0_SCR_REG_OFFSET = 0x00, 49 NV_PORT1_SCR_REG_OFFSET = 0x40, 50 51 /* INT_STATUS/ENABLE */ 52 NV_INT_STATUS = 0x10, 53 NV_INT_ENABLE = 0x11, 54 NV_INT_STATUS_CK804 = 0x440, 55 NV_INT_ENABLE_CK804 = 0x441, 56 57 /* INT_STATUS/ENABLE bits */ 58 NV_INT_DEV = 0x01, 59 NV_INT_PM = 0x02, 60 NV_INT_ADDED = 0x04, 61 NV_INT_REMOVED = 0x08, 62 63 NV_INT_PORT_SHIFT = 4, /* each port occupies 4 bits */ 64 65 NV_INT_ALL = 0x0f, 66 NV_INT_MASK = NV_INT_DEV | 67 NV_INT_ADDED | NV_INT_REMOVED, 68 69 /* INT_CONFIG */ 70 NV_INT_CONFIG = 0x12, 71 NV_INT_CONFIG_METHD = 0x01, // 0 = INT, 1 = SMI 72 73 // For PCI config register 20 74 NV_MCP_SATA_CFG_20 = 0x50, 75 NV_MCP_SATA_CFG_20_SATA_SPACE_EN = 0x04, 76 NV_MCP_SATA_CFG_20_PORT0_EN = (1 << 17), 77 NV_MCP_SATA_CFG_20_PORT1_EN = (1 << 16), 78 NV_MCP_SATA_CFG_20_PORT0_PWB_EN = (1 << 14), 79 NV_MCP_SATA_CFG_20_PORT1_PWB_EN = (1 << 12), 80 81 NV_ADMA_MAX_CPBS = 32, 82 NV_ADMA_CPB_SZ = 128, 83 NV_ADMA_APRD_SZ = 16, 84 NV_ADMA_SGTBL_LEN = (1024 - NV_ADMA_CPB_SZ) / 85 NV_ADMA_APRD_SZ, 86 NV_ADMA_SGTBL_TOTAL_LEN = NV_ADMA_SGTBL_LEN + 5, 87 NV_ADMA_SGTBL_SZ = NV_ADMA_SGTBL_LEN * NV_ADMA_APRD_SZ, 88 NV_ADMA_PORT_PRIV_DMA_SZ = NV_ADMA_MAX_CPBS * 89 (NV_ADMA_CPB_SZ + NV_ADMA_SGTBL_SZ), 90 91 /* BAR5 offset to ADMA general registers */ 92 NV_ADMA_GEN = 0x400, 93 NV_ADMA_GEN_CTL = 0x00, 94 NV_ADMA_NOTIFIER_CLEAR = 0x30, 95 96 /* BAR5 offset to ADMA ports */ 97 NV_ADMA_PORT = 0x480, 98 99 /* size of ADMA port register space */ 100 NV_ADMA_PORT_SIZE = 0x100, 101 102 /* ADMA port registers */ 103 NV_ADMA_CTL = 0x40, 104 NV_ADMA_CPB_COUNT = 0x42, 105 NV_ADMA_NEXT_CPB_IDX = 0x43, 106 NV_ADMA_STAT = 0x44, 107 NV_ADMA_CPB_BASE_LOW = 0x48, 108 NV_ADMA_CPB_BASE_HIGH = 0x4C, 109 NV_ADMA_APPEND = 0x50, 110 NV_ADMA_NOTIFIER = 0x68, 111 NV_ADMA_NOTIFIER_ERROR = 0x6C, 112 113 /* NV_ADMA_CTL register bits */ 114 NV_ADMA_CTL_HOTPLUG_IEN = (1 << 0), 115 NV_ADMA_CTL_CHANNEL_RESET = (1 << 5), 116 NV_ADMA_CTL_GO = (1 << 7), 117 NV_ADMA_CTL_AIEN = (1 << 8), 118 NV_ADMA_CTL_READ_NON_COHERENT = (1 << 11), 119 NV_ADMA_CTL_WRITE_NON_COHERENT = (1 << 12), 120 121 /* CPB response flag bits */ 122 NV_CPB_RESP_DONE = (1 << 0), 123 NV_CPB_RESP_ATA_ERR = (1 << 3), 124 NV_CPB_RESP_CMD_ERR = (1 << 4), 125 NV_CPB_RESP_CPB_ERR = (1 << 7), 126 127 /* CPB control flag bits */ 128 NV_CPB_CTL_CPB_VALID = (1 << 0), 129 NV_CPB_CTL_QUEUE = (1 << 1), 130 NV_CPB_CTL_APRD_VALID = (1 << 2), 131 NV_CPB_CTL_IEN = (1 << 3), 132 NV_CPB_CTL_FPDMA = (1 << 4), 133 134 /* APRD flags */ 135 NV_APRD_WRITE = (1 << 1), 136 NV_APRD_END = (1 << 2), 137 NV_APRD_CONT = (1 << 3), 138 139 /* NV_ADMA_STAT flags */ 140 NV_ADMA_STAT_TIMEOUT = (1 << 0), 141 NV_ADMA_STAT_HOTUNPLUG = (1 << 1), 142 NV_ADMA_STAT_HOTPLUG = (1 << 2), 143 NV_ADMA_STAT_CPBERR = (1 << 4), 144 NV_ADMA_STAT_SERROR = (1 << 5), 145 NV_ADMA_STAT_CMD_COMPLETE = (1 << 6), 146 NV_ADMA_STAT_IDLE = (1 << 8), 147 NV_ADMA_STAT_LEGACY = (1 << 9), 148 NV_ADMA_STAT_STOPPED = (1 << 10), 149 NV_ADMA_STAT_DONE = (1 << 12), 150 NV_ADMA_STAT_ERR = NV_ADMA_STAT_CPBERR | 151 NV_ADMA_STAT_TIMEOUT, 152 153 /* port flags */ 154 NV_ADMA_PORT_REGISTER_MODE = (1 << 0), 155 NV_ADMA_ATAPI_SETUP_COMPLETE = (1 << 1), 156 157 /* MCP55 reg offset */ 158 NV_CTL_MCP55 = 0x400, 159 NV_INT_STATUS_MCP55 = 0x440, 160 NV_INT_ENABLE_MCP55 = 0x444, 161 NV_NCQ_REG_MCP55 = 0x448, 162 163 /* MCP55 */ 164 NV_INT_ALL_MCP55 = 0xffff, 165 NV_INT_PORT_SHIFT_MCP55 = 16, /* each port occupies 16 bits */ 166 NV_INT_MASK_MCP55 = NV_INT_ALL_MCP55 & 0xfffd, 167 168 /* SWNCQ ENABLE BITS*/ 169 NV_CTL_PRI_SWNCQ = 0x02, 170 NV_CTL_SEC_SWNCQ = 0x04, 171 172 /* SW NCQ status bits*/ 173 NV_SWNCQ_IRQ_DEV = (1 << 0), 174 NV_SWNCQ_IRQ_PM = (1 << 1), 175 NV_SWNCQ_IRQ_ADDED = (1 << 2), 176 NV_SWNCQ_IRQ_REMOVED = (1 << 3), 177 178 NV_SWNCQ_IRQ_BACKOUT = (1 << 4), 179 NV_SWNCQ_IRQ_SDBFIS = (1 << 5), 180 NV_SWNCQ_IRQ_DHREGFIS = (1 << 6), 181 NV_SWNCQ_IRQ_DMASETUP = (1 << 7), 182 183 NV_SWNCQ_IRQ_HOTPLUG = NV_SWNCQ_IRQ_ADDED | 184 NV_SWNCQ_IRQ_REMOVED, 185 186}; 187 188/* ADMA Physical Region Descriptor - one SG segment */ 189struct nv_adma_prd { 190 __le64 addr; 191 __le32 len; 192 u8 flags; 193 u8 packet_len; 194 __le16 reserved; 195}; 196 197enum nv_adma_regbits { 198 CMDEND = (1 << 15), /* end of command list */ 199 WNB = (1 << 14), /* wait-not-BSY */ 200 IGN = (1 << 13), /* ignore this entry */ 201 CS1n = (1 << (4 + 8)), /* std. PATA signals follow... */ 202 DA2 = (1 << (2 + 8)), 203 DA1 = (1 << (1 + 8)), 204 DA0 = (1 << (0 + 8)), 205}; 206 207/* ADMA Command Parameter Block 208 The first 5 SG segments are stored inside the Command Parameter Block itself. 209 If there are more than 5 segments the remainder are stored in a separate 210 memory area indicated by next_aprd. */ 211struct nv_adma_cpb { 212 u8 resp_flags; /* 0 */ 213 u8 reserved1; /* 1 */ 214 u8 ctl_flags; /* 2 */ 215 /* len is length of taskfile in 64 bit words */ 216 u8 len; /* 3 */ 217 u8 tag; /* 4 */ 218 u8 next_cpb_idx; /* 5 */ 219 __le16 reserved2; /* 6-7 */ 220 __le16 tf[12]; /* 8-31 */ 221 struct nv_adma_prd aprd[5]; /* 32-111 */ 222 __le64 next_aprd; /* 112-119 */ 223 __le64 reserved3; /* 120-127 */ 224}; 225 226 227struct nv_adma_port_priv { 228 struct nv_adma_cpb *cpb; 229 dma_addr_t cpb_dma; 230 struct nv_adma_prd *aprd; 231 dma_addr_t aprd_dma; 232 void __iomem *ctl_block; 233 void __iomem *gen_block; 234 void __iomem *notifier_clear_block; 235 u64 adma_dma_mask; 236 u8 flags; 237 int last_issue_ncq; 238}; 239 240struct nv_host_priv { 241 unsigned long type; 242}; 243 244struct defer_queue { 245 u32 defer_bits; 246 unsigned int head; 247 unsigned int tail; 248 unsigned int tag[ATA_MAX_QUEUE]; 249}; 250 251enum ncq_saw_flag_list { 252 ncq_saw_d2h = (1U << 0), 253 ncq_saw_dmas = (1U << 1), 254 ncq_saw_sdb = (1U << 2), 255 ncq_saw_backout = (1U << 3), 256}; 257 258struct nv_swncq_port_priv { 259 struct ata_bmdma_prd *prd; /* our SG list */ 260 dma_addr_t prd_dma; /* and its DMA mapping */ 261 void __iomem *sactive_block; 262 void __iomem *irq_block; 263 void __iomem *tag_block; 264 u32 qc_active; 265 266 unsigned int last_issue_tag; 267 268 /* fifo circular queue to store deferral command */ 269 struct defer_queue defer_queue; 270 271 /* for NCQ interrupt analysis */ 272 u32 dhfis_bits; 273 u32 dmafis_bits; 274 u32 sdbfis_bits; 275 276 unsigned int ncq_flags; 277}; 278 279 280#define NV_ADMA_CHECK_INTR(GCTL, PORT) ((GCTL) & (1 << (19 + (12 * (PORT))))) 281 282static int nv_init_one(struct pci_dev *pdev, const struct pci_device_id *ent); 283#ifdef CONFIG_PM_SLEEP 284static int nv_pci_device_resume(struct pci_dev *pdev); 285#endif 286static void nv_ck804_host_stop(struct ata_host *host); 287static irqreturn_t nv_generic_interrupt(int irq, void *dev_instance); 288static irqreturn_t nv_nf2_interrupt(int irq, void *dev_instance); 289static irqreturn_t nv_ck804_interrupt(int irq, void *dev_instance); 290static int nv_scr_read(struct ata_link *link, unsigned int sc_reg, u32 *val); 291static int nv_scr_write(struct ata_link *link, unsigned int sc_reg, u32 val); 292 293static int nv_hardreset(struct ata_link *link, unsigned int *class, 294 unsigned long deadline); 295static void nv_nf2_freeze(struct ata_port *ap); 296static void nv_nf2_thaw(struct ata_port *ap); 297static void nv_ck804_freeze(struct ata_port *ap); 298static void nv_ck804_thaw(struct ata_port *ap); 299static int nv_adma_slave_config(struct scsi_device *sdev); 300static int nv_adma_check_atapi_dma(struct ata_queued_cmd *qc); 301static enum ata_completion_errors nv_adma_qc_prep(struct ata_queued_cmd *qc); 302static unsigned int nv_adma_qc_issue(struct ata_queued_cmd *qc); 303static irqreturn_t nv_adma_interrupt(int irq, void *dev_instance); 304static void nv_adma_irq_clear(struct ata_port *ap); 305static int nv_adma_port_start(struct ata_port *ap); 306static void nv_adma_port_stop(struct ata_port *ap); 307#ifdef CONFIG_PM 308static int nv_adma_port_suspend(struct ata_port *ap, pm_message_t mesg); 309static int nv_adma_port_resume(struct ata_port *ap); 310#endif 311static void nv_adma_freeze(struct ata_port *ap); 312static void nv_adma_thaw(struct ata_port *ap); 313static void nv_adma_error_handler(struct ata_port *ap); 314static void nv_adma_host_stop(struct ata_host *host); 315static void nv_adma_post_internal_cmd(struct ata_queued_cmd *qc); 316static void nv_adma_tf_read(struct ata_port *ap, struct ata_taskfile *tf); 317 318static void nv_mcp55_thaw(struct ata_port *ap); 319static void nv_mcp55_freeze(struct ata_port *ap); 320static void nv_swncq_error_handler(struct ata_port *ap); 321static int nv_swncq_slave_config(struct scsi_device *sdev); 322static int nv_swncq_port_start(struct ata_port *ap); 323static enum ata_completion_errors nv_swncq_qc_prep(struct ata_queued_cmd *qc); 324static void nv_swncq_fill_sg(struct ata_queued_cmd *qc); 325static unsigned int nv_swncq_qc_issue(struct ata_queued_cmd *qc); 326static void nv_swncq_irq_clear(struct ata_port *ap, u16 fis); 327static irqreturn_t nv_swncq_interrupt(int irq, void *dev_instance); 328#ifdef CONFIG_PM 329static int nv_swncq_port_suspend(struct ata_port *ap, pm_message_t mesg); 330static int nv_swncq_port_resume(struct ata_port *ap); 331#endif 332 333enum nv_host_type 334{ 335 GENERIC, 336 NFORCE2, 337 NFORCE3 = NFORCE2, /* NF2 == NF3 as far as sata_nv is concerned */ 338 CK804, 339 ADMA, 340 MCP5x, 341 SWNCQ, 342}; 343 344static const struct pci_device_id nv_pci_tbl[] = { 345 { PCI_VDEVICE(NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE2S_SATA), NFORCE2 }, 346 { PCI_VDEVICE(NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE3S_SATA), NFORCE3 }, 347 { PCI_VDEVICE(NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE3S_SATA2), NFORCE3 }, 348 { PCI_VDEVICE(NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE_CK804_SATA), CK804 }, 349 { PCI_VDEVICE(NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE_CK804_SATA2), CK804 }, 350 { PCI_VDEVICE(NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE_MCP04_SATA), CK804 }, 351 { PCI_VDEVICE(NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE_MCP04_SATA2), CK804 }, 352 { PCI_VDEVICE(NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE_MCP51_SATA), MCP5x }, 353 { PCI_VDEVICE(NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE_MCP51_SATA2), MCP5x }, 354 { PCI_VDEVICE(NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE_MCP55_SATA), MCP5x }, 355 { PCI_VDEVICE(NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE_MCP55_SATA2), MCP5x }, 356 { PCI_VDEVICE(NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE_MCP61_SATA), GENERIC }, 357 { PCI_VDEVICE(NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE_MCP61_SATA2), GENERIC }, 358 { PCI_VDEVICE(NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE_MCP61_SATA3), GENERIC }, 359 360 { } /* terminate list */ 361}; 362 363static struct pci_driver nv_pci_driver = { 364 .name = DRV_NAME, 365 .id_table = nv_pci_tbl, 366 .probe = nv_init_one, 367#ifdef CONFIG_PM_SLEEP 368 .suspend = ata_pci_device_suspend, 369 .resume = nv_pci_device_resume, 370#endif 371 .remove = ata_pci_remove_one, 372}; 373 374static const struct scsi_host_template nv_sht = { 375 ATA_BMDMA_SHT(DRV_NAME), 376}; 377 378static const struct scsi_host_template nv_adma_sht = { 379 __ATA_BASE_SHT(DRV_NAME), 380 .can_queue = NV_ADMA_MAX_CPBS, 381 .sg_tablesize = NV_ADMA_SGTBL_TOTAL_LEN, 382 .dma_boundary = NV_ADMA_DMA_BOUNDARY, 383 .slave_configure = nv_adma_slave_config, 384 .sdev_groups = ata_ncq_sdev_groups, 385 .change_queue_depth = ata_scsi_change_queue_depth, 386 .tag_alloc_policy = BLK_TAG_ALLOC_RR, 387}; 388 389static const struct scsi_host_template nv_swncq_sht = { 390 __ATA_BASE_SHT(DRV_NAME), 391 .can_queue = ATA_MAX_QUEUE - 1, 392 .sg_tablesize = LIBATA_MAX_PRD, 393 .dma_boundary = ATA_DMA_BOUNDARY, 394 .slave_configure = nv_swncq_slave_config, 395 .sdev_groups = ata_ncq_sdev_groups, 396 .change_queue_depth = ata_scsi_change_queue_depth, 397 .tag_alloc_policy = BLK_TAG_ALLOC_RR, 398}; 399 400/* 401 * NV SATA controllers have various different problems with hardreset 402 * protocol depending on the specific controller and device. 403 * 404 * GENERIC: 405 * 406 * bko11195 reports that link doesn't come online after hardreset on 407 * generic nv's and there have been several other similar reports on 408 * linux-ide. 409 * 410 * bko12351#c23 reports that warmplug on MCP61 doesn't work with 411 * softreset. 412 * 413 * NF2/3: 414 * 415 * bko3352 reports nf2/3 controllers can't determine device signature 416 * reliably after hardreset. The following thread reports detection 417 * failure on cold boot with the standard debouncing timing. 418 * 419 * http://thread.gmane.org/gmane.linux.ide/34098 420 * 421 * bko12176 reports that hardreset fails to bring up the link during 422 * boot on nf2. 423 * 424 * CK804: 425 * 426 * For initial probing after boot and hot plugging, hardreset mostly 427 * works fine on CK804 but curiously, reprobing on the initial port 428 * by rescanning or rmmod/insmod fails to acquire the initial D2H Reg 429 * FIS in somewhat undeterministic way. 430 * 431 * SWNCQ: 432 * 433 * bko12351 reports that when SWNCQ is enabled, for hotplug to work, 434 * hardreset should be used and hardreset can't report proper 435 * signature, which suggests that mcp5x is closer to nf2 as long as 436 * reset quirkiness is concerned. 437 * 438 * bko12703 reports that boot probing fails for intel SSD with 439 * hardreset. Link fails to come online. Softreset works fine. 440 * 441 * The failures are varied but the following patterns seem true for 442 * all flavors. 443 * 444 * - Softreset during boot always works. 445 * 446 * - Hardreset during boot sometimes fails to bring up the link on 447 * certain comibnations and device signature acquisition is 448 * unreliable. 449 * 450 * - Hardreset is often necessary after hotplug. 451 * 452 * So, preferring softreset for boot probing and error handling (as 453 * hardreset might bring down the link) but using hardreset for 454 * post-boot probing should work around the above issues in most 455 * cases. Define nv_hardreset() which only kicks in for post-boot 456 * probing and use it for all variants. 457 */ 458static struct ata_port_operations nv_generic_ops = { 459 .inherits = &ata_bmdma_port_ops, 460 .lost_interrupt = ATA_OP_NULL, 461 .scr_read = nv_scr_read, 462 .scr_write = nv_scr_write, 463 .hardreset = nv_hardreset, 464}; 465 466static struct ata_port_operations nv_nf2_ops = { 467 .inherits = &nv_generic_ops, 468 .freeze = nv_nf2_freeze, 469 .thaw = nv_nf2_thaw, 470}; 471 472static struct ata_port_operations nv_ck804_ops = { 473 .inherits = &nv_generic_ops, 474 .freeze = nv_ck804_freeze, 475 .thaw = nv_ck804_thaw, 476 .host_stop = nv_ck804_host_stop, 477}; 478 479static struct ata_port_operations nv_adma_ops = { 480 .inherits = &nv_ck804_ops, 481 482 .check_atapi_dma = nv_adma_check_atapi_dma, 483 .sff_tf_read = nv_adma_tf_read, 484 .qc_defer = ata_std_qc_defer, 485 .qc_prep = nv_adma_qc_prep, 486 .qc_issue = nv_adma_qc_issue, 487 .sff_irq_clear = nv_adma_irq_clear, 488 489 .freeze = nv_adma_freeze, 490 .thaw = nv_adma_thaw, 491 .error_handler = nv_adma_error_handler, 492 .post_internal_cmd = nv_adma_post_internal_cmd, 493 494 .port_start = nv_adma_port_start, 495 .port_stop = nv_adma_port_stop, 496#ifdef CONFIG_PM 497 .port_suspend = nv_adma_port_suspend, 498 .port_resume = nv_adma_port_resume, 499#endif 500 .host_stop = nv_adma_host_stop, 501}; 502 503static struct ata_port_operations nv_swncq_ops = { 504 .inherits = &nv_generic_ops, 505 506 .qc_defer = ata_std_qc_defer, 507 .qc_prep = nv_swncq_qc_prep, 508 .qc_issue = nv_swncq_qc_issue, 509 510 .freeze = nv_mcp55_freeze, 511 .thaw = nv_mcp55_thaw, 512 .error_handler = nv_swncq_error_handler, 513 514#ifdef CONFIG_PM 515 .port_suspend = nv_swncq_port_suspend, 516 .port_resume = nv_swncq_port_resume, 517#endif 518 .port_start = nv_swncq_port_start, 519}; 520 521struct nv_pi_priv { 522 irq_handler_t irq_handler; 523 const struct scsi_host_template *sht; 524}; 525 526#define NV_PI_PRIV(_irq_handler, _sht) \ 527 &(struct nv_pi_priv){ .irq_handler = _irq_handler, .sht = _sht } 528 529static const struct ata_port_info nv_port_info[] = { 530 /* generic */ 531 { 532 .flags = ATA_FLAG_SATA, 533 .pio_mask = NV_PIO_MASK, 534 .mwdma_mask = NV_MWDMA_MASK, 535 .udma_mask = NV_UDMA_MASK, 536 .port_ops = &nv_generic_ops, 537 .private_data = NV_PI_PRIV(nv_generic_interrupt, &nv_sht), 538 }, 539 /* nforce2/3 */ 540 { 541 .flags = ATA_FLAG_SATA, 542 .pio_mask = NV_PIO_MASK, 543 .mwdma_mask = NV_MWDMA_MASK, 544 .udma_mask = NV_UDMA_MASK, 545 .port_ops = &nv_nf2_ops, 546 .private_data = NV_PI_PRIV(nv_nf2_interrupt, &nv_sht), 547 }, 548 /* ck804 */ 549 { 550 .flags = ATA_FLAG_SATA, 551 .pio_mask = NV_PIO_MASK, 552 .mwdma_mask = NV_MWDMA_MASK, 553 .udma_mask = NV_UDMA_MASK, 554 .port_ops = &nv_ck804_ops, 555 .private_data = NV_PI_PRIV(nv_ck804_interrupt, &nv_sht), 556 }, 557 /* ADMA */ 558 { 559 .flags = ATA_FLAG_SATA | ATA_FLAG_NCQ, 560 .pio_mask = NV_PIO_MASK, 561 .mwdma_mask = NV_MWDMA_MASK, 562 .udma_mask = NV_UDMA_MASK, 563 .port_ops = &nv_adma_ops, 564 .private_data = NV_PI_PRIV(nv_adma_interrupt, &nv_adma_sht), 565 }, 566 /* MCP5x */ 567 { 568 .flags = ATA_FLAG_SATA, 569 .pio_mask = NV_PIO_MASK, 570 .mwdma_mask = NV_MWDMA_MASK, 571 .udma_mask = NV_UDMA_MASK, 572 .port_ops = &nv_generic_ops, 573 .private_data = NV_PI_PRIV(nv_generic_interrupt, &nv_sht), 574 }, 575 /* SWNCQ */ 576 { 577 .flags = ATA_FLAG_SATA | ATA_FLAG_NCQ, 578 .pio_mask = NV_PIO_MASK, 579 .mwdma_mask = NV_MWDMA_MASK, 580 .udma_mask = NV_UDMA_MASK, 581 .port_ops = &nv_swncq_ops, 582 .private_data = NV_PI_PRIV(nv_swncq_interrupt, &nv_swncq_sht), 583 }, 584}; 585 586MODULE_AUTHOR("NVIDIA"); 587MODULE_DESCRIPTION("low-level driver for NVIDIA nForce SATA controller"); 588MODULE_LICENSE("GPL"); 589MODULE_DEVICE_TABLE(pci, nv_pci_tbl); 590MODULE_VERSION(DRV_VERSION); 591 592static bool adma_enabled; 593static bool swncq_enabled = true; 594static bool msi_enabled; 595 596static void nv_adma_register_mode(struct ata_port *ap) 597{ 598 struct nv_adma_port_priv *pp = ap->private_data; 599 void __iomem *mmio = pp->ctl_block; 600 u16 tmp, status; 601 int count = 0; 602 603 if (pp->flags & NV_ADMA_PORT_REGISTER_MODE) 604 return; 605 606 status = readw(mmio + NV_ADMA_STAT); 607 while (!(status & NV_ADMA_STAT_IDLE) && count < 20) { 608 ndelay(50); 609 status = readw(mmio + NV_ADMA_STAT); 610 count++; 611 } 612 if (count == 20) 613 ata_port_warn(ap, "timeout waiting for ADMA IDLE, stat=0x%hx\n", 614 status); 615 616 tmp = readw(mmio + NV_ADMA_CTL); 617 writew(tmp & ~NV_ADMA_CTL_GO, mmio + NV_ADMA_CTL); 618 619 count = 0; 620 status = readw(mmio + NV_ADMA_STAT); 621 while (!(status & NV_ADMA_STAT_LEGACY) && count < 20) { 622 ndelay(50); 623 status = readw(mmio + NV_ADMA_STAT); 624 count++; 625 } 626 if (count == 20) 627 ata_port_warn(ap, 628 "timeout waiting for ADMA LEGACY, stat=0x%hx\n", 629 status); 630 631 pp->flags |= NV_ADMA_PORT_REGISTER_MODE; 632} 633 634static void nv_adma_mode(struct ata_port *ap) 635{ 636 struct nv_adma_port_priv *pp = ap->private_data; 637 void __iomem *mmio = pp->ctl_block; 638 u16 tmp, status; 639 int count = 0; 640 641 if (!(pp->flags & NV_ADMA_PORT_REGISTER_MODE)) 642 return; 643 644 WARN_ON(pp->flags & NV_ADMA_ATAPI_SETUP_COMPLETE); 645 646 tmp = readw(mmio + NV_ADMA_CTL); 647 writew(tmp | NV_ADMA_CTL_GO, mmio + NV_ADMA_CTL); 648 649 status = readw(mmio + NV_ADMA_STAT); 650 while (((status & NV_ADMA_STAT_LEGACY) || 651 !(status & NV_ADMA_STAT_IDLE)) && count < 20) { 652 ndelay(50); 653 status = readw(mmio + NV_ADMA_STAT); 654 count++; 655 } 656 if (count == 20) 657 ata_port_warn(ap, 658 "timeout waiting for ADMA LEGACY clear and IDLE, stat=0x%hx\n", 659 status); 660 661 pp->flags &= ~NV_ADMA_PORT_REGISTER_MODE; 662} 663 664static int nv_adma_slave_config(struct scsi_device *sdev) 665{ 666 struct ata_port *ap = ata_shost_to_port(sdev->host); 667 struct nv_adma_port_priv *pp = ap->private_data; 668 struct nv_adma_port_priv *port0, *port1; 669 struct pci_dev *pdev = to_pci_dev(ap->host->dev); 670 unsigned long segment_boundary, flags; 671 unsigned short sg_tablesize; 672 int rc; 673 int adma_enable; 674 u32 current_reg, new_reg, config_mask; 675 676 rc = ata_scsi_slave_config(sdev); 677 678 if (sdev->id >= ATA_MAX_DEVICES || sdev->channel || sdev->lun) 679 /* Not a proper libata device, ignore */ 680 return rc; 681 682 spin_lock_irqsave(ap->lock, flags); 683 684 if (ap->link.device[sdev->id].class == ATA_DEV_ATAPI) { 685 /* 686 * NVIDIA reports that ADMA mode does not support ATAPI commands. 687 * Therefore ATAPI commands are sent through the legacy interface. 688 * However, the legacy interface only supports 32-bit DMA. 689 * Restrict DMA parameters as required by the legacy interface 690 * when an ATAPI device is connected. 691 */ 692 segment_boundary = ATA_DMA_BOUNDARY; 693 /* Subtract 1 since an extra entry may be needed for padding, see 694 libata-scsi.c */ 695 sg_tablesize = LIBATA_MAX_PRD - 1; 696 697 /* Since the legacy DMA engine is in use, we need to disable ADMA 698 on the port. */ 699 adma_enable = 0; 700 nv_adma_register_mode(ap); 701 } else { 702 segment_boundary = NV_ADMA_DMA_BOUNDARY; 703 sg_tablesize = NV_ADMA_SGTBL_TOTAL_LEN; 704 adma_enable = 1; 705 } 706 707 pci_read_config_dword(pdev, NV_MCP_SATA_CFG_20, ¤t_reg); 708 709 if (ap->port_no == 1) 710 config_mask = NV_MCP_SATA_CFG_20_PORT1_EN | 711 NV_MCP_SATA_CFG_20_PORT1_PWB_EN; 712 else 713 config_mask = NV_MCP_SATA_CFG_20_PORT0_EN | 714 NV_MCP_SATA_CFG_20_PORT0_PWB_EN; 715 716 if (adma_enable) { 717 new_reg = current_reg | config_mask; 718 pp->flags &= ~NV_ADMA_ATAPI_SETUP_COMPLETE; 719 } else { 720 new_reg = current_reg & ~config_mask; 721 pp->flags |= NV_ADMA_ATAPI_SETUP_COMPLETE; 722 } 723 724 if (current_reg != new_reg) 725 pci_write_config_dword(pdev, NV_MCP_SATA_CFG_20, new_reg); 726 727 port0 = ap->host->ports[0]->private_data; 728 port1 = ap->host->ports[1]->private_data; 729 if ((port0->flags & NV_ADMA_ATAPI_SETUP_COMPLETE) || 730 (port1->flags & NV_ADMA_ATAPI_SETUP_COMPLETE)) { 731 /* 732 * We have to set the DMA mask to 32-bit if either port is in 733 * ATAPI mode, since they are on the same PCI device which is 734 * used for DMA mapping. If either SCSI device is not allocated 735 * yet, it's OK since that port will discover its correct 736 * setting when it does get allocated. 737 */ 738 rc = dma_set_mask(&pdev->dev, ATA_DMA_MASK); 739 } else { 740 rc = dma_set_mask(&pdev->dev, pp->adma_dma_mask); 741 } 742 743 blk_queue_segment_boundary(sdev->request_queue, segment_boundary); 744 blk_queue_max_segments(sdev->request_queue, sg_tablesize); 745 ata_port_info(ap, 746 "DMA mask 0x%llX, segment boundary 0x%lX, hw segs %hu\n", 747 (unsigned long long)*ap->host->dev->dma_mask, 748 segment_boundary, sg_tablesize); 749 750 spin_unlock_irqrestore(ap->lock, flags); 751 752 return rc; 753} 754 755static int nv_adma_check_atapi_dma(struct ata_queued_cmd *qc) 756{ 757 struct nv_adma_port_priv *pp = qc->ap->private_data; 758 return !(pp->flags & NV_ADMA_ATAPI_SETUP_COMPLETE); 759} 760 761static void nv_adma_tf_read(struct ata_port *ap, struct ata_taskfile *tf) 762{ 763 /* Other than when internal or pass-through commands are executed, 764 the only time this function will be called in ADMA mode will be 765 if a command fails. In the failure case we don't care about going 766 into register mode with ADMA commands pending, as the commands will 767 all shortly be aborted anyway. We assume that NCQ commands are not 768 issued via passthrough, which is the only way that switching into 769 ADMA mode could abort outstanding commands. */ 770 nv_adma_register_mode(ap); 771 772 ata_sff_tf_read(ap, tf); 773} 774 775static unsigned int nv_adma_tf_to_cpb(struct ata_taskfile *tf, __le16 *cpb) 776{ 777 unsigned int idx = 0; 778 779 if (tf->flags & ATA_TFLAG_ISADDR) { 780 if (tf->flags & ATA_TFLAG_LBA48) { 781 cpb[idx++] = cpu_to_le16((ATA_REG_ERR << 8) | tf->hob_feature | WNB); 782 cpb[idx++] = cpu_to_le16((ATA_REG_NSECT << 8) | tf->hob_nsect); 783 cpb[idx++] = cpu_to_le16((ATA_REG_LBAL << 8) | tf->hob_lbal); 784 cpb[idx++] = cpu_to_le16((ATA_REG_LBAM << 8) | tf->hob_lbam); 785 cpb[idx++] = cpu_to_le16((ATA_REG_LBAH << 8) | tf->hob_lbah); 786 cpb[idx++] = cpu_to_le16((ATA_REG_ERR << 8) | tf->feature); 787 } else 788 cpb[idx++] = cpu_to_le16((ATA_REG_ERR << 8) | tf->feature | WNB); 789 790 cpb[idx++] = cpu_to_le16((ATA_REG_NSECT << 8) | tf->nsect); 791 cpb[idx++] = cpu_to_le16((ATA_REG_LBAL << 8) | tf->lbal); 792 cpb[idx++] = cpu_to_le16((ATA_REG_LBAM << 8) | tf->lbam); 793 cpb[idx++] = cpu_to_le16((ATA_REG_LBAH << 8) | tf->lbah); 794 } 795 796 if (tf->flags & ATA_TFLAG_DEVICE) 797 cpb[idx++] = cpu_to_le16((ATA_REG_DEVICE << 8) | tf->device); 798 799 cpb[idx++] = cpu_to_le16((ATA_REG_CMD << 8) | tf->command | CMDEND); 800 801 while (idx < 12) 802 cpb[idx++] = cpu_to_le16(IGN); 803 804 return idx; 805} 806 807static int nv_adma_check_cpb(struct ata_port *ap, int cpb_num, int force_err) 808{ 809 struct nv_adma_port_priv *pp = ap->private_data; 810 u8 flags = pp->cpb[cpb_num].resp_flags; 811 812 ata_port_dbg(ap, "CPB %d, flags=0x%x\n", cpb_num, flags); 813 814 if (unlikely((force_err || 815 flags & (NV_CPB_RESP_ATA_ERR | 816 NV_CPB_RESP_CMD_ERR | 817 NV_CPB_RESP_CPB_ERR)))) { 818 struct ata_eh_info *ehi = &ap->link.eh_info; 819 int freeze = 0; 820 821 ata_ehi_clear_desc(ehi); 822 __ata_ehi_push_desc(ehi, "CPB resp_flags 0x%x: ", flags); 823 if (flags & NV_CPB_RESP_ATA_ERR) { 824 ata_ehi_push_desc(ehi, "ATA error"); 825 ehi->err_mask |= AC_ERR_DEV; 826 } else if (flags & NV_CPB_RESP_CMD_ERR) { 827 ata_ehi_push_desc(ehi, "CMD error"); 828 ehi->err_mask |= AC_ERR_DEV; 829 } else if (flags & NV_CPB_RESP_CPB_ERR) { 830 ata_ehi_push_desc(ehi, "CPB error"); 831 ehi->err_mask |= AC_ERR_SYSTEM; 832 freeze = 1; 833 } else { 834 /* notifier error, but no error in CPB flags? */ 835 ata_ehi_push_desc(ehi, "unknown"); 836 ehi->err_mask |= AC_ERR_OTHER; 837 freeze = 1; 838 } 839 /* Kill all commands. EH will determine what actually failed. */ 840 if (freeze) 841 ata_port_freeze(ap); 842 else 843 ata_port_abort(ap); 844 return -1; 845 } 846 847 if (likely(flags & NV_CPB_RESP_DONE)) 848 return 1; 849 return 0; 850} 851 852static int nv_host_intr(struct ata_port *ap, u8 irq_stat) 853{ 854 struct ata_queued_cmd *qc = ata_qc_from_tag(ap, ap->link.active_tag); 855 856 /* freeze if hotplugged */ 857 if (unlikely(irq_stat & (NV_INT_ADDED | NV_INT_REMOVED))) { 858 ata_port_freeze(ap); 859 return 1; 860 } 861 862 /* bail out if not our interrupt */ 863 if (!(irq_stat & NV_INT_DEV)) 864 return 0; 865 866 /* DEV interrupt w/ no active qc? */ 867 if (unlikely(!qc || (qc->tf.flags & ATA_TFLAG_POLLING))) { 868 ata_sff_check_status(ap); 869 return 1; 870 } 871 872 /* handle interrupt */ 873 return ata_bmdma_port_intr(ap, qc); 874} 875 876static irqreturn_t nv_adma_interrupt(int irq, void *dev_instance) 877{ 878 struct ata_host *host = dev_instance; 879 int i, handled = 0; 880 u32 notifier_clears[2]; 881 882 spin_lock(&host->lock); 883 884 for (i = 0; i < host->n_ports; i++) { 885 struct ata_port *ap = host->ports[i]; 886 struct nv_adma_port_priv *pp = ap->private_data; 887 void __iomem *mmio = pp->ctl_block; 888 u16 status; 889 u32 gen_ctl; 890 u32 notifier, notifier_error; 891 892 notifier_clears[i] = 0; 893 894 /* if ADMA is disabled, use standard ata interrupt handler */ 895 if (pp->flags & NV_ADMA_ATAPI_SETUP_COMPLETE) { 896 u8 irq_stat = readb(host->iomap[NV_MMIO_BAR] + NV_INT_STATUS_CK804) 897 >> (NV_INT_PORT_SHIFT * i); 898 handled += nv_host_intr(ap, irq_stat); 899 continue; 900 } 901 902 /* if in ATA register mode, check for standard interrupts */ 903 if (pp->flags & NV_ADMA_PORT_REGISTER_MODE) { 904 u8 irq_stat = readb(host->iomap[NV_MMIO_BAR] + NV_INT_STATUS_CK804) 905 >> (NV_INT_PORT_SHIFT * i); 906 if (ata_tag_valid(ap->link.active_tag)) 907 /** NV_INT_DEV indication seems unreliable 908 at times at least in ADMA mode. Force it 909 on always when a command is active, to 910 prevent losing interrupts. */ 911 irq_stat |= NV_INT_DEV; 912 handled += nv_host_intr(ap, irq_stat); 913 } 914 915 notifier = readl(mmio + NV_ADMA_NOTIFIER); 916 notifier_error = readl(mmio + NV_ADMA_NOTIFIER_ERROR); 917 notifier_clears[i] = notifier | notifier_error; 918 919 gen_ctl = readl(pp->gen_block + NV_ADMA_GEN_CTL); 920 921 if (!NV_ADMA_CHECK_INTR(gen_ctl, ap->port_no) && !notifier && 922 !notifier_error) 923 /* Nothing to do */ 924 continue; 925 926 status = readw(mmio + NV_ADMA_STAT); 927 928 /* 929 * Clear status. Ensure the controller sees the 930 * clearing before we start looking at any of the CPB 931 * statuses, so that any CPB completions after this 932 * point in the handler will raise another interrupt. 933 */ 934 writew(status, mmio + NV_ADMA_STAT); 935 readw(mmio + NV_ADMA_STAT); /* flush posted write */ 936 rmb(); 937 938 handled++; /* irq handled if we got here */ 939 940 /* freeze if hotplugged or controller error */ 941 if (unlikely(status & (NV_ADMA_STAT_HOTPLUG | 942 NV_ADMA_STAT_HOTUNPLUG | 943 NV_ADMA_STAT_TIMEOUT | 944 NV_ADMA_STAT_SERROR))) { 945 struct ata_eh_info *ehi = &ap->link.eh_info; 946 947 ata_ehi_clear_desc(ehi); 948 __ata_ehi_push_desc(ehi, "ADMA status 0x%08x: ", status); 949 if (status & NV_ADMA_STAT_TIMEOUT) { 950 ehi->err_mask |= AC_ERR_SYSTEM; 951 ata_ehi_push_desc(ehi, "timeout"); 952 } else if (status & NV_ADMA_STAT_HOTPLUG) { 953 ata_ehi_hotplugged(ehi); 954 ata_ehi_push_desc(ehi, "hotplug"); 955 } else if (status & NV_ADMA_STAT_HOTUNPLUG) { 956 ata_ehi_hotplugged(ehi); 957 ata_ehi_push_desc(ehi, "hot unplug"); 958 } else if (status & NV_ADMA_STAT_SERROR) { 959 /* let EH analyze SError and figure out cause */ 960 ata_ehi_push_desc(ehi, "SError"); 961 } else 962 ata_ehi_push_desc(ehi, "unknown"); 963 ata_port_freeze(ap); 964 continue; 965 } 966 967 if (status & (NV_ADMA_STAT_DONE | 968 NV_ADMA_STAT_CPBERR | 969 NV_ADMA_STAT_CMD_COMPLETE)) { 970 u32 check_commands = notifier_clears[i]; 971 u32 done_mask = 0; 972 int pos, rc; 973 974 if (status & NV_ADMA_STAT_CPBERR) { 975 /* check all active commands */ 976 if (ata_tag_valid(ap->link.active_tag)) 977 check_commands = 1 << 978 ap->link.active_tag; 979 else 980 check_commands = ap->link.sactive; 981 } 982 983 /* check CPBs for completed commands */ 984 while ((pos = ffs(check_commands))) { 985 pos--; 986 rc = nv_adma_check_cpb(ap, pos, 987 notifier_error & (1 << pos)); 988 if (rc > 0) 989 done_mask |= 1 << pos; 990 else if (unlikely(rc < 0)) 991 check_commands = 0; 992 check_commands &= ~(1 << pos); 993 } 994 ata_qc_complete_multiple(ap, ata_qc_get_active(ap) ^ done_mask); 995 } 996 } 997 998 if (notifier_clears[0] || notifier_clears[1]) { 999 /* Note: Both notifier clear registers must be written 1000 if either is set, even if one is zero, according to NVIDIA. */ 1001 struct nv_adma_port_priv *pp = host->ports[0]->private_data; 1002 writel(notifier_clears[0], pp->notifier_clear_block); 1003 pp = host->ports[1]->private_data; 1004 writel(notifier_clears[1], pp->notifier_clear_block); 1005 } 1006 1007 spin_unlock(&host->lock); 1008 1009 return IRQ_RETVAL(handled); 1010} 1011 1012static void nv_adma_freeze(struct ata_port *ap) 1013{ 1014 struct nv_adma_port_priv *pp = ap->private_data; 1015 void __iomem *mmio = pp->ctl_block; 1016 u16 tmp; 1017 1018 nv_ck804_freeze(ap); 1019 1020 if (pp->flags & NV_ADMA_ATAPI_SETUP_COMPLETE) 1021 return; 1022 1023 /* clear any outstanding CK804 notifications */ 1024 writeb(NV_INT_ALL << (ap->port_no * NV_INT_PORT_SHIFT), 1025 ap->host->iomap[NV_MMIO_BAR] + NV_INT_STATUS_CK804); 1026 1027 /* Disable interrupt */ 1028 tmp = readw(mmio + NV_ADMA_CTL); 1029 writew(tmp & ~(NV_ADMA_CTL_AIEN | NV_ADMA_CTL_HOTPLUG_IEN), 1030 mmio + NV_ADMA_CTL); 1031 readw(mmio + NV_ADMA_CTL); /* flush posted write */ 1032} 1033 1034static void nv_adma_thaw(struct ata_port *ap) 1035{ 1036 struct nv_adma_port_priv *pp = ap->private_data; 1037 void __iomem *mmio = pp->ctl_block; 1038 u16 tmp; 1039 1040 nv_ck804_thaw(ap); 1041 1042 if (pp->flags & NV_ADMA_ATAPI_SETUP_COMPLETE) 1043 return; 1044 1045 /* Enable interrupt */ 1046 tmp = readw(mmio + NV_ADMA_CTL); 1047 writew(tmp | (NV_ADMA_CTL_AIEN | NV_ADMA_CTL_HOTPLUG_IEN), 1048 mmio + NV_ADMA_CTL); 1049 readw(mmio + NV_ADMA_CTL); /* flush posted write */ 1050} 1051 1052static void nv_adma_irq_clear(struct ata_port *ap) 1053{ 1054 struct nv_adma_port_priv *pp = ap->private_data; 1055 void __iomem *mmio = pp->ctl_block; 1056 u32 notifier_clears[2]; 1057 1058 if (pp->flags & NV_ADMA_ATAPI_SETUP_COMPLETE) { 1059 ata_bmdma_irq_clear(ap); 1060 return; 1061 } 1062 1063 /* clear any outstanding CK804 notifications */ 1064 writeb(NV_INT_ALL << (ap->port_no * NV_INT_PORT_SHIFT), 1065 ap->host->iomap[NV_MMIO_BAR] + NV_INT_STATUS_CK804); 1066 1067 /* clear ADMA status */ 1068 writew(0xffff, mmio + NV_ADMA_STAT); 1069 1070 /* clear notifiers - note both ports need to be written with 1071 something even though we are only clearing on one */ 1072 if (ap->port_no == 0) { 1073 notifier_clears[0] = 0xFFFFFFFF; 1074 notifier_clears[1] = 0; 1075 } else { 1076 notifier_clears[0] = 0; 1077 notifier_clears[1] = 0xFFFFFFFF; 1078 } 1079 pp = ap->host->ports[0]->private_data; 1080 writel(notifier_clears[0], pp->notifier_clear_block); 1081 pp = ap->host->ports[1]->private_data; 1082 writel(notifier_clears[1], pp->notifier_clear_block); 1083} 1084 1085static void nv_adma_post_internal_cmd(struct ata_queued_cmd *qc) 1086{ 1087 struct nv_adma_port_priv *pp = qc->ap->private_data; 1088 1089 if (pp->flags & NV_ADMA_PORT_REGISTER_MODE) 1090 ata_bmdma_post_internal_cmd(qc); 1091} 1092 1093static int nv_adma_port_start(struct ata_port *ap) 1094{ 1095 struct device *dev = ap->host->dev; 1096 struct nv_adma_port_priv *pp; 1097 int rc; 1098 void *mem; 1099 dma_addr_t mem_dma; 1100 void __iomem *mmio; 1101 struct pci_dev *pdev = to_pci_dev(dev); 1102 u16 tmp; 1103 1104 /* 1105 * Ensure DMA mask is set to 32-bit before allocating legacy PRD and 1106 * pad buffers. 1107 */ 1108 rc = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32)); 1109 if (rc) 1110 return rc; 1111 1112 /* we might fallback to bmdma, allocate bmdma resources */ 1113 rc = ata_bmdma_port_start(ap); 1114 if (rc) 1115 return rc; 1116 1117 pp = devm_kzalloc(dev, sizeof(*pp), GFP_KERNEL); 1118 if (!pp) 1119 return -ENOMEM; 1120 1121 mmio = ap->host->iomap[NV_MMIO_BAR] + NV_ADMA_PORT + 1122 ap->port_no * NV_ADMA_PORT_SIZE; 1123 pp->ctl_block = mmio; 1124 pp->gen_block = ap->host->iomap[NV_MMIO_BAR] + NV_ADMA_GEN; 1125 pp->notifier_clear_block = pp->gen_block + 1126 NV_ADMA_NOTIFIER_CLEAR + (4 * ap->port_no); 1127 1128 /* 1129 * Now that the legacy PRD and padding buffer are allocated we can 1130 * raise the DMA mask to allocate the CPB/APRD table. 1131 */ 1132 dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64)); 1133 1134 pp->adma_dma_mask = *dev->dma_mask; 1135 1136 mem = dmam_alloc_coherent(dev, NV_ADMA_PORT_PRIV_DMA_SZ, 1137 &mem_dma, GFP_KERNEL); 1138 if (!mem) 1139 return -ENOMEM; 1140 1141 /* 1142 * First item in chunk of DMA memory: 1143 * 128-byte command parameter block (CPB) 1144 * one for each command tag 1145 */ 1146 pp->cpb = mem; 1147 pp->cpb_dma = mem_dma; 1148 1149 writel(mem_dma & 0xFFFFFFFF, mmio + NV_ADMA_CPB_BASE_LOW); 1150 writel((mem_dma >> 16) >> 16, mmio + NV_ADMA_CPB_BASE_HIGH); 1151 1152 mem += NV_ADMA_MAX_CPBS * NV_ADMA_CPB_SZ; 1153 mem_dma += NV_ADMA_MAX_CPBS * NV_ADMA_CPB_SZ; 1154 1155 /* 1156 * Second item: block of ADMA_SGTBL_LEN s/g entries 1157 */ 1158 pp->aprd = mem; 1159 pp->aprd_dma = mem_dma; 1160 1161 ap->private_data = pp; 1162 1163 /* clear any outstanding interrupt conditions */ 1164 writew(0xffff, mmio + NV_ADMA_STAT); 1165 1166 /* initialize port variables */ 1167 pp->flags = NV_ADMA_PORT_REGISTER_MODE; 1168 1169 /* clear CPB fetch count */ 1170 writew(0, mmio + NV_ADMA_CPB_COUNT); 1171 1172 /* clear GO for register mode, enable interrupt */ 1173 tmp = readw(mmio + NV_ADMA_CTL); 1174 writew((tmp & ~NV_ADMA_CTL_GO) | NV_ADMA_CTL_AIEN | 1175 NV_ADMA_CTL_HOTPLUG_IEN, mmio + NV_ADMA_CTL); 1176 1177 tmp = readw(mmio + NV_ADMA_CTL); 1178 writew(tmp | NV_ADMA_CTL_CHANNEL_RESET, mmio + NV_ADMA_CTL); 1179 readw(mmio + NV_ADMA_CTL); /* flush posted write */ 1180 udelay(1); 1181 writew(tmp & ~NV_ADMA_CTL_CHANNEL_RESET, mmio + NV_ADMA_CTL); 1182 readw(mmio + NV_ADMA_CTL); /* flush posted write */ 1183 1184 return 0; 1185} 1186 1187static void nv_adma_port_stop(struct ata_port *ap) 1188{ 1189 struct nv_adma_port_priv *pp = ap->private_data; 1190 void __iomem *mmio = pp->ctl_block; 1191 1192 writew(0, mmio + NV_ADMA_CTL); 1193} 1194 1195#ifdef CONFIG_PM 1196static int nv_adma_port_suspend(struct ata_port *ap, pm_message_t mesg) 1197{ 1198 struct nv_adma_port_priv *pp = ap->private_data; 1199 void __iomem *mmio = pp->ctl_block; 1200 1201 /* Go to register mode - clears GO */ 1202 nv_adma_register_mode(ap); 1203 1204 /* clear CPB fetch count */ 1205 writew(0, mmio + NV_ADMA_CPB_COUNT); 1206 1207 /* disable interrupt, shut down port */ 1208 writew(0, mmio + NV_ADMA_CTL); 1209 1210 return 0; 1211} 1212 1213static int nv_adma_port_resume(struct ata_port *ap) 1214{ 1215 struct nv_adma_port_priv *pp = ap->private_data; 1216 void __iomem *mmio = pp->ctl_block; 1217 u16 tmp; 1218 1219 /* set CPB block location */ 1220 writel(pp->cpb_dma & 0xFFFFFFFF, mmio + NV_ADMA_CPB_BASE_LOW); 1221 writel((pp->cpb_dma >> 16) >> 16, mmio + NV_ADMA_CPB_BASE_HIGH); 1222 1223 /* clear any outstanding interrupt conditions */ 1224 writew(0xffff, mmio + NV_ADMA_STAT); 1225 1226 /* initialize port variables */ 1227 pp->flags |= NV_ADMA_PORT_REGISTER_MODE; 1228 1229 /* clear CPB fetch count */ 1230 writew(0, mmio + NV_ADMA_CPB_COUNT); 1231 1232 /* clear GO for register mode, enable interrupt */ 1233 tmp = readw(mmio + NV_ADMA_CTL); 1234 writew((tmp & ~NV_ADMA_CTL_GO) | NV_ADMA_CTL_AIEN | 1235 NV_ADMA_CTL_HOTPLUG_IEN, mmio + NV_ADMA_CTL); 1236 1237 tmp = readw(mmio + NV_ADMA_CTL); 1238 writew(tmp | NV_ADMA_CTL_CHANNEL_RESET, mmio + NV_ADMA_CTL); 1239 readw(mmio + NV_ADMA_CTL); /* flush posted write */ 1240 udelay(1); 1241 writew(tmp & ~NV_ADMA_CTL_CHANNEL_RESET, mmio + NV_ADMA_CTL); 1242 readw(mmio + NV_ADMA_CTL); /* flush posted write */ 1243 1244 return 0; 1245} 1246#endif 1247 1248static void nv_adma_setup_port(struct ata_port *ap) 1249{ 1250 void __iomem *mmio = ap->host->iomap[NV_MMIO_BAR]; 1251 struct ata_ioports *ioport = &ap->ioaddr; 1252 1253 mmio += NV_ADMA_PORT + ap->port_no * NV_ADMA_PORT_SIZE; 1254 1255 ioport->cmd_addr = mmio; 1256 ioport->data_addr = mmio + (ATA_REG_DATA * 4); 1257 ioport->error_addr = 1258 ioport->feature_addr = mmio + (ATA_REG_ERR * 4); 1259 ioport->nsect_addr = mmio + (ATA_REG_NSECT * 4); 1260 ioport->lbal_addr = mmio + (ATA_REG_LBAL * 4); 1261 ioport->lbam_addr = mmio + (ATA_REG_LBAM * 4); 1262 ioport->lbah_addr = mmio + (ATA_REG_LBAH * 4); 1263 ioport->device_addr = mmio + (ATA_REG_DEVICE * 4); 1264 ioport->status_addr = 1265 ioport->command_addr = mmio + (ATA_REG_STATUS * 4); 1266 ioport->altstatus_addr = 1267 ioport->ctl_addr = mmio + 0x20; 1268} 1269 1270static int nv_adma_host_init(struct ata_host *host) 1271{ 1272 struct pci_dev *pdev = to_pci_dev(host->dev); 1273 unsigned int i; 1274 u32 tmp32; 1275 1276 /* enable ADMA on the ports */ 1277 pci_read_config_dword(pdev, NV_MCP_SATA_CFG_20, &tmp32); 1278 tmp32 |= NV_MCP_SATA_CFG_20_PORT0_EN | 1279 NV_MCP_SATA_CFG_20_PORT0_PWB_EN | 1280 NV_MCP_SATA_CFG_20_PORT1_EN | 1281 NV_MCP_SATA_CFG_20_PORT1_PWB_EN; 1282 1283 pci_write_config_dword(pdev, NV_MCP_SATA_CFG_20, tmp32); 1284 1285 for (i = 0; i < host->n_ports; i++) 1286 nv_adma_setup_port(host->ports[i]); 1287 1288 return 0; 1289} 1290 1291static void nv_adma_fill_aprd(struct ata_queued_cmd *qc, 1292 struct scatterlist *sg, 1293 int idx, 1294 struct nv_adma_prd *aprd) 1295{ 1296 u8 flags = 0; 1297 if (qc->tf.flags & ATA_TFLAG_WRITE) 1298 flags |= NV_APRD_WRITE; 1299 if (idx == qc->n_elem - 1) 1300 flags |= NV_APRD_END; 1301 else if (idx != 4) 1302 flags |= NV_APRD_CONT; 1303 1304 aprd->addr = cpu_to_le64(((u64)sg_dma_address(sg))); 1305 aprd->len = cpu_to_le32(((u32)sg_dma_len(sg))); /* len in bytes */ 1306 aprd->flags = flags; 1307 aprd->packet_len = 0; 1308} 1309 1310static void nv_adma_fill_sg(struct ata_queued_cmd *qc, struct nv_adma_cpb *cpb) 1311{ 1312 struct nv_adma_port_priv *pp = qc->ap->private_data; 1313 struct nv_adma_prd *aprd; 1314 struct scatterlist *sg; 1315 unsigned int si; 1316 1317 for_each_sg(qc->sg, sg, qc->n_elem, si) { 1318 aprd = (si < 5) ? &cpb->aprd[si] : 1319 &pp->aprd[NV_ADMA_SGTBL_LEN * qc->hw_tag + (si-5)]; 1320 nv_adma_fill_aprd(qc, sg, si, aprd); 1321 } 1322 if (si > 5) 1323 cpb->next_aprd = cpu_to_le64(((u64)(pp->aprd_dma + NV_ADMA_SGTBL_SZ * qc->hw_tag))); 1324 else 1325 cpb->next_aprd = cpu_to_le64(0); 1326} 1327 1328static int nv_adma_use_reg_mode(struct ata_queued_cmd *qc) 1329{ 1330 struct nv_adma_port_priv *pp = qc->ap->private_data; 1331 1332 /* ADMA engine can only be used for non-ATAPI DMA commands, 1333 or interrupt-driven no-data commands. */ 1334 if ((pp->flags & NV_ADMA_ATAPI_SETUP_COMPLETE) || 1335 (qc->tf.flags & ATA_TFLAG_POLLING)) 1336 return 1; 1337 1338 if ((qc->flags & ATA_QCFLAG_DMAMAP) || 1339 (qc->tf.protocol == ATA_PROT_NODATA)) 1340 return 0; 1341 1342 return 1; 1343} 1344 1345static enum ata_completion_errors nv_adma_qc_prep(struct ata_queued_cmd *qc) 1346{ 1347 struct nv_adma_port_priv *pp = qc->ap->private_data; 1348 struct nv_adma_cpb *cpb = &pp->cpb[qc->hw_tag]; 1349 u8 ctl_flags = NV_CPB_CTL_CPB_VALID | 1350 NV_CPB_CTL_IEN; 1351 1352 if (nv_adma_use_reg_mode(qc)) { 1353 BUG_ON(!(pp->flags & NV_ADMA_ATAPI_SETUP_COMPLETE) && 1354 (qc->flags & ATA_QCFLAG_DMAMAP)); 1355 nv_adma_register_mode(qc->ap); 1356 ata_bmdma_qc_prep(qc); 1357 return AC_ERR_OK; 1358 } 1359 1360 cpb->resp_flags = NV_CPB_RESP_DONE; 1361 wmb(); 1362 cpb->ctl_flags = 0; 1363 wmb(); 1364 1365 cpb->len = 3; 1366 cpb->tag = qc->hw_tag; 1367 cpb->next_cpb_idx = 0; 1368 1369 /* turn on NCQ flags for NCQ commands */ 1370 if (qc->tf.protocol == ATA_PROT_NCQ) 1371 ctl_flags |= NV_CPB_CTL_QUEUE | NV_CPB_CTL_FPDMA; 1372 1373 nv_adma_tf_to_cpb(&qc->tf, cpb->tf); 1374 1375 if (qc->flags & ATA_QCFLAG_DMAMAP) { 1376 nv_adma_fill_sg(qc, cpb); 1377 ctl_flags |= NV_CPB_CTL_APRD_VALID; 1378 } else 1379 memset(&cpb->aprd[0], 0, sizeof(struct nv_adma_prd) * 5); 1380 1381 /* Be paranoid and don't let the device see NV_CPB_CTL_CPB_VALID 1382 until we are finished filling in all of the contents */ 1383 wmb(); 1384 cpb->ctl_flags = ctl_flags; 1385 wmb(); 1386 cpb->resp_flags = 0; 1387 1388 return AC_ERR_OK; 1389} 1390 1391static unsigned int nv_adma_qc_issue(struct ata_queued_cmd *qc) 1392{ 1393 struct nv_adma_port_priv *pp = qc->ap->private_data; 1394 void __iomem *mmio = pp->ctl_block; 1395 int curr_ncq = (qc->tf.protocol == ATA_PROT_NCQ); 1396 1397 /* We can't handle result taskfile with NCQ commands, since 1398 retrieving the taskfile switches us out of ADMA mode and would abort 1399 existing commands. */ 1400 if (unlikely(qc->tf.protocol == ATA_PROT_NCQ && 1401 (qc->flags & ATA_QCFLAG_RESULT_TF))) { 1402 ata_dev_err(qc->dev, "NCQ w/ RESULT_TF not allowed\n"); 1403 return AC_ERR_SYSTEM; 1404 } 1405 1406 if (nv_adma_use_reg_mode(qc)) { 1407 /* use ATA register mode */ 1408 BUG_ON(!(pp->flags & NV_ADMA_ATAPI_SETUP_COMPLETE) && 1409 (qc->flags & ATA_QCFLAG_DMAMAP)); 1410 nv_adma_register_mode(qc->ap); 1411 return ata_bmdma_qc_issue(qc); 1412 } else 1413 nv_adma_mode(qc->ap); 1414 1415 /* write append register, command tag in lower 8 bits 1416 and (number of cpbs to append -1) in top 8 bits */ 1417 wmb(); 1418 1419 if (curr_ncq != pp->last_issue_ncq) { 1420 /* Seems to need some delay before switching between NCQ and 1421 non-NCQ commands, else we get command timeouts and such. */ 1422 udelay(20); 1423 pp->last_issue_ncq = curr_ncq; 1424 } 1425 1426 writew(qc->hw_tag, mmio + NV_ADMA_APPEND); 1427 1428 return 0; 1429} 1430 1431static irqreturn_t nv_generic_interrupt(int irq, void *dev_instance) 1432{ 1433 struct ata_host *host = dev_instance; 1434 unsigned int i; 1435 unsigned int handled = 0; 1436 unsigned long flags; 1437 1438 spin_lock_irqsave(&host->lock, flags); 1439 1440 for (i = 0; i < host->n_ports; i++) { 1441 struct ata_port *ap = host->ports[i]; 1442 struct ata_queued_cmd *qc; 1443 1444 qc = ata_qc_from_tag(ap, ap->link.active_tag); 1445 if (qc && (!(qc->tf.flags & ATA_TFLAG_POLLING))) { 1446 handled += ata_bmdma_port_intr(ap, qc); 1447 } else { 1448 /* 1449 * No request pending? Clear interrupt status 1450 * anyway, in case there's one pending. 1451 */ 1452 ap->ops->sff_check_status(ap); 1453 } 1454 } 1455 1456 spin_unlock_irqrestore(&host->lock, flags); 1457 1458 return IRQ_RETVAL(handled); 1459} 1460 1461static irqreturn_t nv_do_interrupt(struct ata_host *host, u8 irq_stat) 1462{ 1463 int i, handled = 0; 1464 1465 for (i = 0; i < host->n_ports; i++) { 1466 handled += nv_host_intr(host->ports[i], irq_stat); 1467 irq_stat >>= NV_INT_PORT_SHIFT; 1468 } 1469 1470 return IRQ_RETVAL(handled); 1471} 1472 1473static irqreturn_t nv_nf2_interrupt(int irq, void *dev_instance) 1474{ 1475 struct ata_host *host = dev_instance; 1476 u8 irq_stat; 1477 irqreturn_t ret; 1478 1479 spin_lock(&host->lock); 1480 irq_stat = ioread8(host->ports[0]->ioaddr.scr_addr + NV_INT_STATUS); 1481 ret = nv_do_interrupt(host, irq_stat); 1482 spin_unlock(&host->lock); 1483 1484 return ret; 1485} 1486 1487static irqreturn_t nv_ck804_interrupt(int irq, void *dev_instance) 1488{ 1489 struct ata_host *host = dev_instance; 1490 u8 irq_stat; 1491 irqreturn_t ret; 1492 1493 spin_lock(&host->lock); 1494 irq_stat = readb(host->iomap[NV_MMIO_BAR] + NV_INT_STATUS_CK804); 1495 ret = nv_do_interrupt(host, irq_stat); 1496 spin_unlock(&host->lock); 1497 1498 return ret; 1499} 1500 1501static int nv_scr_read(struct ata_link *link, unsigned int sc_reg, u32 *val) 1502{ 1503 if (sc_reg > SCR_CONTROL) 1504 return -EINVAL; 1505 1506 *val = ioread32(link->ap->ioaddr.scr_addr + (sc_reg * 4)); 1507 return 0; 1508} 1509 1510static int nv_scr_write(struct ata_link *link, unsigned int sc_reg, u32 val) 1511{ 1512 if (sc_reg > SCR_CONTROL) 1513 return -EINVAL; 1514 1515 iowrite32(val, link->ap->ioaddr.scr_addr + (sc_reg * 4)); 1516 return 0; 1517} 1518 1519static int nv_hardreset(struct ata_link *link, unsigned int *class, 1520 unsigned long deadline) 1521{ 1522 struct ata_eh_context *ehc = &link->eh_context; 1523 1524 /* Do hardreset iff it's post-boot probing, please read the 1525 * comment above port ops for details. 1526 */ 1527 if (!(link->ap->pflags & ATA_PFLAG_LOADING) && 1528 !ata_dev_enabled(link->device)) 1529 sata_link_hardreset(link, sata_deb_timing_hotplug, deadline, 1530 NULL, NULL); 1531 else { 1532 const unsigned int *timing = sata_ehc_deb_timing(ehc); 1533 int rc; 1534 1535 if (!(ehc->i.flags & ATA_EHI_QUIET)) 1536 ata_link_info(link, 1537 "nv: skipping hardreset on occupied port\n"); 1538 1539 /* make sure the link is online */ 1540 rc = sata_link_resume(link, timing, deadline); 1541 /* whine about phy resume failure but proceed */ 1542 if (rc && rc != -EOPNOTSUPP) 1543 ata_link_warn(link, "failed to resume link (errno=%d)\n", 1544 rc); 1545 } 1546 1547 /* device signature acquisition is unreliable */ 1548 return -EAGAIN; 1549} 1550 1551static void nv_nf2_freeze(struct ata_port *ap) 1552{ 1553 void __iomem *scr_addr = ap->host->ports[0]->ioaddr.scr_addr; 1554 int shift = ap->port_no * NV_INT_PORT_SHIFT; 1555 u8 mask; 1556 1557 mask = ioread8(scr_addr + NV_INT_ENABLE); 1558 mask &= ~(NV_INT_ALL << shift); 1559 iowrite8(mask, scr_addr + NV_INT_ENABLE); 1560} 1561 1562static void nv_nf2_thaw(struct ata_port *ap) 1563{ 1564 void __iomem *scr_addr = ap->host->ports[0]->ioaddr.scr_addr; 1565 int shift = ap->port_no * NV_INT_PORT_SHIFT; 1566 u8 mask; 1567 1568 iowrite8(NV_INT_ALL << shift, scr_addr + NV_INT_STATUS); 1569 1570 mask = ioread8(scr_addr + NV_INT_ENABLE); 1571 mask |= (NV_INT_MASK << shift); 1572 iowrite8(mask, scr_addr + NV_INT_ENABLE); 1573} 1574 1575static void nv_ck804_freeze(struct ata_port *ap) 1576{ 1577 void __iomem *mmio_base = ap->host->iomap[NV_MMIO_BAR]; 1578 int shift = ap->port_no * NV_INT_PORT_SHIFT; 1579 u8 mask; 1580 1581 mask = readb(mmio_base + NV_INT_ENABLE_CK804); 1582 mask &= ~(NV_INT_ALL << shift); 1583 writeb(mask, mmio_base + NV_INT_ENABLE_CK804); 1584} 1585 1586static void nv_ck804_thaw(struct ata_port *ap) 1587{ 1588 void __iomem *mmio_base = ap->host->iomap[NV_MMIO_BAR]; 1589 int shift = ap->port_no * NV_INT_PORT_SHIFT; 1590 u8 mask; 1591 1592 writeb(NV_INT_ALL << shift, mmio_base + NV_INT_STATUS_CK804); 1593 1594 mask = readb(mmio_base + NV_INT_ENABLE_CK804); 1595 mask |= (NV_INT_MASK << shift); 1596 writeb(mask, mmio_base + NV_INT_ENABLE_CK804); 1597} 1598 1599static void nv_mcp55_freeze(struct ata_port *ap) 1600{ 1601 void __iomem *mmio_base = ap->host->iomap[NV_MMIO_BAR]; 1602 int shift = ap->port_no * NV_INT_PORT_SHIFT_MCP55; 1603 u32 mask; 1604 1605 writel(NV_INT_ALL_MCP55 << shift, mmio_base + NV_INT_STATUS_MCP55); 1606 1607 mask = readl(mmio_base + NV_INT_ENABLE_MCP55); 1608 mask &= ~(NV_INT_ALL_MCP55 << shift); 1609 writel(mask, mmio_base + NV_INT_ENABLE_MCP55); 1610} 1611 1612static void nv_mcp55_thaw(struct ata_port *ap) 1613{ 1614 void __iomem *mmio_base = ap->host->iomap[NV_MMIO_BAR]; 1615 int shift = ap->port_no * NV_INT_PORT_SHIFT_MCP55; 1616 u32 mask; 1617 1618 writel(NV_INT_ALL_MCP55 << shift, mmio_base + NV_INT_STATUS_MCP55); 1619 1620 mask = readl(mmio_base + NV_INT_ENABLE_MCP55); 1621 mask |= (NV_INT_MASK_MCP55 << shift); 1622 writel(mask, mmio_base + NV_INT_ENABLE_MCP55); 1623} 1624 1625static void nv_adma_error_handler(struct ata_port *ap) 1626{ 1627 struct nv_adma_port_priv *pp = ap->private_data; 1628 if (!(pp->flags & NV_ADMA_PORT_REGISTER_MODE)) { 1629 void __iomem *mmio = pp->ctl_block; 1630 int i; 1631 u16 tmp; 1632 1633 if (ata_tag_valid(ap->link.active_tag) || ap->link.sactive) { 1634 u32 notifier = readl(mmio + NV_ADMA_NOTIFIER); 1635 u32 notifier_error = readl(mmio + NV_ADMA_NOTIFIER_ERROR); 1636 u32 gen_ctl = readl(pp->gen_block + NV_ADMA_GEN_CTL); 1637 u32 status = readw(mmio + NV_ADMA_STAT); 1638 u8 cpb_count = readb(mmio + NV_ADMA_CPB_COUNT); 1639 u8 next_cpb_idx = readb(mmio + NV_ADMA_NEXT_CPB_IDX); 1640 1641 ata_port_err(ap, 1642 "EH in ADMA mode, notifier 0x%X " 1643 "notifier_error 0x%X gen_ctl 0x%X status 0x%X " 1644 "next cpb count 0x%X next cpb idx 0x%x\n", 1645 notifier, notifier_error, gen_ctl, status, 1646 cpb_count, next_cpb_idx); 1647 1648 for (i = 0; i < NV_ADMA_MAX_CPBS; i++) { 1649 struct nv_adma_cpb *cpb = &pp->cpb[i]; 1650 if ((ata_tag_valid(ap->link.active_tag) && i == ap->link.active_tag) || 1651 ap->link.sactive & (1 << i)) 1652 ata_port_err(ap, 1653 "CPB %d: ctl_flags 0x%x, resp_flags 0x%x\n", 1654 i, cpb->ctl_flags, cpb->resp_flags); 1655 } 1656 } 1657 1658 /* Push us back into port register mode for error handling. */ 1659 nv_adma_register_mode(ap); 1660 1661 /* Mark all of the CPBs as invalid to prevent them from 1662 being executed */ 1663 for (i = 0; i < NV_ADMA_MAX_CPBS; i++) 1664 pp->cpb[i].ctl_flags &= ~NV_CPB_CTL_CPB_VALID; 1665 1666 /* clear CPB fetch count */ 1667 writew(0, mmio + NV_ADMA_CPB_COUNT); 1668 1669 /* Reset channel */ 1670 tmp = readw(mmio + NV_ADMA_CTL); 1671 writew(tmp | NV_ADMA_CTL_CHANNEL_RESET, mmio + NV_ADMA_CTL); 1672 readw(mmio + NV_ADMA_CTL); /* flush posted write */ 1673 udelay(1); 1674 writew(tmp & ~NV_ADMA_CTL_CHANNEL_RESET, mmio + NV_ADMA_CTL); 1675 readw(mmio + NV_ADMA_CTL); /* flush posted write */ 1676 } 1677 1678 ata_bmdma_error_handler(ap); 1679} 1680 1681static void nv_swncq_qc_to_dq(struct ata_port *ap, struct ata_queued_cmd *qc) 1682{ 1683 struct nv_swncq_port_priv *pp = ap->private_data; 1684 struct defer_queue *dq = &pp->defer_queue; 1685 1686 /* queue is full */ 1687 WARN_ON(dq->tail - dq->head == ATA_MAX_QUEUE); 1688 dq->defer_bits |= (1 << qc->hw_tag); 1689 dq->tag[dq->tail++ & (ATA_MAX_QUEUE - 1)] = qc->hw_tag; 1690} 1691 1692static struct ata_queued_cmd *nv_swncq_qc_from_dq(struct ata_port *ap) 1693{ 1694 struct nv_swncq_port_priv *pp = ap->private_data; 1695 struct defer_queue *dq = &pp->defer_queue; 1696 unsigned int tag; 1697 1698 if (dq->head == dq->tail) /* null queue */ 1699 return NULL; 1700 1701 tag = dq->tag[dq->head & (ATA_MAX_QUEUE - 1)]; 1702 dq->tag[dq->head++ & (ATA_MAX_QUEUE - 1)] = ATA_TAG_POISON; 1703 WARN_ON(!(dq->defer_bits & (1 << tag))); 1704 dq->defer_bits &= ~(1 << tag); 1705 1706 return ata_qc_from_tag(ap, tag); 1707} 1708 1709static void nv_swncq_fis_reinit(struct ata_port *ap) 1710{ 1711 struct nv_swncq_port_priv *pp = ap->private_data; 1712 1713 pp->dhfis_bits = 0; 1714 pp->dmafis_bits = 0; 1715 pp->sdbfis_bits = 0; 1716 pp->ncq_flags = 0; 1717} 1718 1719static void nv_swncq_pp_reinit(struct ata_port *ap) 1720{ 1721 struct nv_swncq_port_priv *pp = ap->private_data; 1722 struct defer_queue *dq = &pp->defer_queue; 1723 1724 dq->head = 0; 1725 dq->tail = 0; 1726 dq->defer_bits = 0; 1727 pp->qc_active = 0; 1728 pp->last_issue_tag = ATA_TAG_POISON; 1729 nv_swncq_fis_reinit(ap); 1730} 1731 1732static void nv_swncq_irq_clear(struct ata_port *ap, u16 fis) 1733{ 1734 struct nv_swncq_port_priv *pp = ap->private_data; 1735 1736 writew(fis, pp->irq_block); 1737} 1738 1739static void __ata_bmdma_stop(struct ata_port *ap) 1740{ 1741 struct ata_queued_cmd qc; 1742 1743 qc.ap = ap; 1744 ata_bmdma_stop(&qc); 1745} 1746 1747static void nv_swncq_ncq_stop(struct ata_port *ap) 1748{ 1749 struct nv_swncq_port_priv *pp = ap->private_data; 1750 unsigned int i; 1751 u32 sactive; 1752 u32 done_mask; 1753 1754 ata_port_err(ap, "EH in SWNCQ mode,QC:qc_active 0x%llX sactive 0x%X\n", 1755 ap->qc_active, ap->link.sactive); 1756 ata_port_err(ap, 1757 "SWNCQ:qc_active 0x%X defer_bits 0x%X last_issue_tag 0x%x\n " 1758 "dhfis 0x%X dmafis 0x%X sdbfis 0x%X\n", 1759 pp->qc_active, pp->defer_queue.defer_bits, pp->last_issue_tag, 1760 pp->dhfis_bits, pp->dmafis_bits, pp->sdbfis_bits); 1761 1762 ata_port_err(ap, "ATA_REG 0x%X ERR_REG 0x%X\n", 1763 ap->ops->sff_check_status(ap), 1764 ioread8(ap->ioaddr.error_addr)); 1765 1766 sactive = readl(pp->sactive_block); 1767 done_mask = pp->qc_active ^ sactive; 1768 1769 ata_port_err(ap, "tag : dhfis dmafis sdbfis sactive\n"); 1770 for (i = 0; i < ATA_MAX_QUEUE; i++) { 1771 u8 err = 0; 1772 if (pp->qc_active & (1 << i)) 1773 err = 0; 1774 else if (done_mask & (1 << i)) 1775 err = 1; 1776 else 1777 continue; 1778 1779 ata_port_err(ap, 1780 "tag 0x%x: %01x %01x %01x %01x %s\n", i, 1781 (pp->dhfis_bits >> i) & 0x1, 1782 (pp->dmafis_bits >> i) & 0x1, 1783 (pp->sdbfis_bits >> i) & 0x1, 1784 (sactive >> i) & 0x1, 1785 (err ? "error! tag doesn't exit" : " ")); 1786 } 1787 1788 nv_swncq_pp_reinit(ap); 1789 ap->ops->sff_irq_clear(ap); 1790 __ata_bmdma_stop(ap); 1791 nv_swncq_irq_clear(ap, 0xffff); 1792} 1793 1794static void nv_swncq_error_handler(struct ata_port *ap) 1795{ 1796 struct ata_eh_context *ehc = &ap->link.eh_context; 1797 1798 if (ap->link.sactive) { 1799 nv_swncq_ncq_stop(ap); 1800 ehc->i.action |= ATA_EH_RESET; 1801 } 1802 1803 ata_bmdma_error_handler(ap); 1804} 1805 1806#ifdef CONFIG_PM 1807static int nv_swncq_port_suspend(struct ata_port *ap, pm_message_t mesg) 1808{ 1809 void __iomem *mmio = ap->host->iomap[NV_MMIO_BAR]; 1810 u32 tmp; 1811 1812 /* clear irq */ 1813 writel(~0, mmio + NV_INT_STATUS_MCP55); 1814 1815 /* disable irq */ 1816 writel(0, mmio + NV_INT_ENABLE_MCP55); 1817 1818 /* disable swncq */ 1819 tmp = readl(mmio + NV_CTL_MCP55); 1820 tmp &= ~(NV_CTL_PRI_SWNCQ | NV_CTL_SEC_SWNCQ); 1821 writel(tmp, mmio + NV_CTL_MCP55); 1822 1823 return 0; 1824} 1825 1826static int nv_swncq_port_resume(struct ata_port *ap) 1827{ 1828 void __iomem *mmio = ap->host->iomap[NV_MMIO_BAR]; 1829 u32 tmp; 1830 1831 /* clear irq */ 1832 writel(~0, mmio + NV_INT_STATUS_MCP55); 1833 1834 /* enable irq */ 1835 writel(0x00fd00fd, mmio + NV_INT_ENABLE_MCP55); 1836 1837 /* enable swncq */ 1838 tmp = readl(mmio + NV_CTL_MCP55); 1839 writel(tmp | NV_CTL_PRI_SWNCQ | NV_CTL_SEC_SWNCQ, mmio + NV_CTL_MCP55); 1840 1841 return 0; 1842} 1843#endif 1844 1845static void nv_swncq_host_init(struct ata_host *host) 1846{ 1847 u32 tmp; 1848 void __iomem *mmio = host->iomap[NV_MMIO_BAR]; 1849 struct pci_dev *pdev = to_pci_dev(host->dev); 1850 u8 regval; 1851 1852 /* disable ECO 398 */ 1853 pci_read_config_byte(pdev, 0x7f, ®val); 1854 regval &= ~(1 << 7); 1855 pci_write_config_byte(pdev, 0x7f, regval); 1856 1857 /* enable swncq */ 1858 tmp = readl(mmio + NV_CTL_MCP55); 1859 dev_dbg(&pdev->dev, "HOST_CTL:0x%X\n", tmp); 1860 writel(tmp | NV_CTL_PRI_SWNCQ | NV_CTL_SEC_SWNCQ, mmio + NV_CTL_MCP55); 1861 1862 /* enable irq intr */ 1863 tmp = readl(mmio + NV_INT_ENABLE_MCP55); 1864 dev_dbg(&pdev->dev, "HOST_ENABLE:0x%X\n", tmp); 1865 writel(tmp | 0x00fd00fd, mmio + NV_INT_ENABLE_MCP55); 1866 1867 /* clear port irq */ 1868 writel(~0x0, mmio + NV_INT_STATUS_MCP55); 1869} 1870 1871static int nv_swncq_slave_config(struct scsi_device *sdev) 1872{ 1873 struct ata_port *ap = ata_shost_to_port(sdev->host); 1874 struct pci_dev *pdev = to_pci_dev(ap->host->dev); 1875 struct ata_device *dev; 1876 int rc; 1877 u8 rev; 1878 u8 check_maxtor = 0; 1879 unsigned char model_num[ATA_ID_PROD_LEN + 1]; 1880 1881 rc = ata_scsi_slave_config(sdev); 1882 if (sdev->id >= ATA_MAX_DEVICES || sdev->channel || sdev->lun) 1883 /* Not a proper libata device, ignore */ 1884 return rc; 1885 1886 dev = &ap->link.device[sdev->id]; 1887 if (!(ap->flags & ATA_FLAG_NCQ) || dev->class == ATA_DEV_ATAPI) 1888 return rc; 1889 1890 /* if MCP51 and Maxtor, then disable ncq */ 1891 if (pdev->device == PCI_DEVICE_ID_NVIDIA_NFORCE_MCP51_SATA || 1892 pdev->device == PCI_DEVICE_ID_NVIDIA_NFORCE_MCP51_SATA2) 1893 check_maxtor = 1; 1894 1895 /* if MCP55 and rev <= a2 and Maxtor, then disable ncq */ 1896 if (pdev->device == PCI_DEVICE_ID_NVIDIA_NFORCE_MCP55_SATA || 1897 pdev->device == PCI_DEVICE_ID_NVIDIA_NFORCE_MCP55_SATA2) { 1898 pci_read_config_byte(pdev, 0x8, &rev); 1899 if (rev <= 0xa2) 1900 check_maxtor = 1; 1901 } 1902 1903 if (!check_maxtor) 1904 return rc; 1905 1906 ata_id_c_string(dev->id, model_num, ATA_ID_PROD, sizeof(model_num)); 1907 1908 if (strncmp(model_num, "Maxtor", 6) == 0) { 1909 ata_scsi_change_queue_depth(sdev, 1); 1910 ata_dev_notice(dev, "Disabling SWNCQ mode (depth %x)\n", 1911 sdev->queue_depth); 1912 } 1913 1914 return rc; 1915} 1916 1917static int nv_swncq_port_start(struct ata_port *ap) 1918{ 1919 struct device *dev = ap->host->dev; 1920 void __iomem *mmio = ap->host->iomap[NV_MMIO_BAR]; 1921 struct nv_swncq_port_priv *pp; 1922 int rc; 1923 1924 /* we might fallback to bmdma, allocate bmdma resources */ 1925 rc = ata_bmdma_port_start(ap); 1926 if (rc) 1927 return rc; 1928 1929 pp = devm_kzalloc(dev, sizeof(*pp), GFP_KERNEL); 1930 if (!pp) 1931 return -ENOMEM; 1932 1933 pp->prd = dmam_alloc_coherent(dev, ATA_PRD_TBL_SZ * ATA_MAX_QUEUE, 1934 &pp->prd_dma, GFP_KERNEL); 1935 if (!pp->prd) 1936 return -ENOMEM; 1937 1938 ap->private_data = pp; 1939 pp->sactive_block = ap->ioaddr.scr_addr + 4 * SCR_ACTIVE; 1940 pp->irq_block = mmio + NV_INT_STATUS_MCP55 + ap->port_no * 2; 1941 pp->tag_block = mmio + NV_NCQ_REG_MCP55 + ap->port_no * 2; 1942 1943 return 0; 1944} 1945 1946static enum ata_completion_errors nv_swncq_qc_prep(struct ata_queued_cmd *qc) 1947{ 1948 if (qc->tf.protocol != ATA_PROT_NCQ) { 1949 ata_bmdma_qc_prep(qc); 1950 return AC_ERR_OK; 1951 } 1952 1953 if (!(qc->flags & ATA_QCFLAG_DMAMAP)) 1954 return AC_ERR_OK; 1955 1956 nv_swncq_fill_sg(qc); 1957 1958 return AC_ERR_OK; 1959} 1960 1961static void nv_swncq_fill_sg(struct ata_queued_cmd *qc) 1962{ 1963 struct ata_port *ap = qc->ap; 1964 struct scatterlist *sg; 1965 struct nv_swncq_port_priv *pp = ap->private_data; 1966 struct ata_bmdma_prd *prd; 1967 unsigned int si, idx; 1968 1969 prd = pp->prd + ATA_MAX_PRD * qc->hw_tag; 1970 1971 idx = 0; 1972 for_each_sg(qc->sg, sg, qc->n_elem, si) { 1973 u32 addr, offset; 1974 u32 sg_len, len; 1975 1976 addr = (u32)sg_dma_address(sg); 1977 sg_len = sg_dma_len(sg); 1978 1979 while (sg_len) { 1980 offset = addr & 0xffff; 1981 len = sg_len; 1982 if ((offset + sg_len) > 0x10000) 1983 len = 0x10000 - offset; 1984 1985 prd[idx].addr = cpu_to_le32(addr); 1986 prd[idx].flags_len = cpu_to_le32(len & 0xffff); 1987 1988 idx++; 1989 sg_len -= len; 1990 addr += len; 1991 } 1992 } 1993 1994 prd[idx - 1].flags_len |= cpu_to_le32(ATA_PRD_EOT); 1995} 1996 1997static unsigned int nv_swncq_issue_atacmd(struct ata_port *ap, 1998 struct ata_queued_cmd *qc) 1999{ 2000 struct nv_swncq_port_priv *pp = ap->private_data; 2001 2002 if (qc == NULL) 2003 return 0; 2004 2005 writel((1 << qc->hw_tag), pp->sactive_block); 2006 pp->last_issue_tag = qc->hw_tag; 2007 pp->dhfis_bits &= ~(1 << qc->hw_tag); 2008 pp->dmafis_bits &= ~(1 << qc->hw_tag); 2009 pp->qc_active |= (0x1 << qc->hw_tag); 2010 2011 trace_ata_tf_load(ap, &qc->tf); 2012 ap->ops->sff_tf_load(ap, &qc->tf); /* load tf registers */ 2013 trace_ata_exec_command(ap, &qc->tf, qc->hw_tag); 2014 ap->ops->sff_exec_command(ap, &qc->tf); 2015 2016 return 0; 2017} 2018 2019static unsigned int nv_swncq_qc_issue(struct ata_queued_cmd *qc) 2020{ 2021 struct ata_port *ap = qc->ap; 2022 struct nv_swncq_port_priv *pp = ap->private_data; 2023 2024 if (qc->tf.protocol != ATA_PROT_NCQ) 2025 return ata_bmdma_qc_issue(qc); 2026 2027 if (!pp->qc_active) 2028 nv_swncq_issue_atacmd(ap, qc); 2029 else 2030 nv_swncq_qc_to_dq(ap, qc); /* add qc to defer queue */ 2031 2032 return 0; 2033} 2034 2035static void nv_swncq_hotplug(struct ata_port *ap, u32 fis) 2036{ 2037 u32 serror; 2038 struct ata_eh_info *ehi = &ap->link.eh_info; 2039 2040 ata_ehi_clear_desc(ehi); 2041 2042 /* AHCI needs SError cleared; otherwise, it might lock up */ 2043 sata_scr_read(&ap->link, SCR_ERROR, &serror); 2044 sata_scr_write(&ap->link, SCR_ERROR, serror); 2045 2046 /* analyze @irq_stat */ 2047 if (fis & NV_SWNCQ_IRQ_ADDED) 2048 ata_ehi_push_desc(ehi, "hot plug"); 2049 else if (fis & NV_SWNCQ_IRQ_REMOVED) 2050 ata_ehi_push_desc(ehi, "hot unplug"); 2051 2052 ata_ehi_hotplugged(ehi); 2053 2054 /* okay, let's hand over to EH */ 2055 ehi->serror |= serror; 2056 2057 ata_port_freeze(ap); 2058} 2059 2060static int nv_swncq_sdbfis(struct ata_port *ap) 2061{ 2062 struct ata_queued_cmd *qc; 2063 struct nv_swncq_port_priv *pp = ap->private_data; 2064 struct ata_eh_info *ehi = &ap->link.eh_info; 2065 u32 sactive; 2066 u32 done_mask; 2067 u8 host_stat; 2068 u8 lack_dhfis = 0; 2069 2070 host_stat = ap->ops->bmdma_status(ap); 2071 trace_ata_bmdma_status(ap, host_stat); 2072 if (unlikely(host_stat & ATA_DMA_ERR)) { 2073 /* error when transferring data to/from memory */ 2074 ata_ehi_clear_desc(ehi); 2075 ata_ehi_push_desc(ehi, "BMDMA stat 0x%x", host_stat); 2076 ehi->err_mask |= AC_ERR_HOST_BUS; 2077 ehi->action |= ATA_EH_RESET; 2078 return -EINVAL; 2079 } 2080 2081 ap->ops->sff_irq_clear(ap); 2082 __ata_bmdma_stop(ap); 2083 2084 sactive = readl(pp->sactive_block); 2085 done_mask = pp->qc_active ^ sactive; 2086 2087 pp->qc_active &= ~done_mask; 2088 pp->dhfis_bits &= ~done_mask; 2089 pp->dmafis_bits &= ~done_mask; 2090 pp->sdbfis_bits |= done_mask; 2091 ata_qc_complete_multiple(ap, ata_qc_get_active(ap) ^ done_mask); 2092 2093 if (!ap->qc_active) { 2094 ata_port_dbg(ap, "over\n"); 2095 nv_swncq_pp_reinit(ap); 2096 return 0; 2097 } 2098 2099 if (pp->qc_active & pp->dhfis_bits) 2100 return 0; 2101 2102 if ((pp->ncq_flags & ncq_saw_backout) || 2103 (pp->qc_active ^ pp->dhfis_bits)) 2104 /* if the controller can't get a device to host register FIS, 2105 * The driver needs to reissue the new command. 2106 */ 2107 lack_dhfis = 1; 2108 2109 ata_port_dbg(ap, "QC: qc_active 0x%llx," 2110 "SWNCQ:qc_active 0x%X defer_bits %X " 2111 "dhfis 0x%X dmafis 0x%X last_issue_tag %x\n", 2112 ap->qc_active, pp->qc_active, 2113 pp->defer_queue.defer_bits, pp->dhfis_bits, 2114 pp->dmafis_bits, pp->last_issue_tag); 2115 2116 nv_swncq_fis_reinit(ap); 2117 2118 if (lack_dhfis) { 2119 qc = ata_qc_from_tag(ap, pp->last_issue_tag); 2120 nv_swncq_issue_atacmd(ap, qc); 2121 return 0; 2122 } 2123 2124 if (pp->defer_queue.defer_bits) { 2125 /* send deferral queue command */ 2126 qc = nv_swncq_qc_from_dq(ap); 2127 WARN_ON(qc == NULL); 2128 nv_swncq_issue_atacmd(ap, qc); 2129 } 2130 2131 return 0; 2132} 2133 2134static inline u32 nv_swncq_tag(struct ata_port *ap) 2135{ 2136 struct nv_swncq_port_priv *pp = ap->private_data; 2137 u32 tag; 2138 2139 tag = readb(pp->tag_block) >> 2; 2140 return (tag & 0x1f); 2141} 2142 2143static void nv_swncq_dmafis(struct ata_port *ap) 2144{ 2145 struct ata_queued_cmd *qc; 2146 unsigned int rw; 2147 u8 dmactl; 2148 u32 tag; 2149 struct nv_swncq_port_priv *pp = ap->private_data; 2150 2151 __ata_bmdma_stop(ap); 2152 tag = nv_swncq_tag(ap); 2153 2154 ata_port_dbg(ap, "dma setup tag 0x%x\n", tag); 2155 qc = ata_qc_from_tag(ap, tag); 2156 2157 if (unlikely(!qc)) 2158 return; 2159 2160 rw = qc->tf.flags & ATA_TFLAG_WRITE; 2161 2162 /* load PRD table addr. */ 2163 iowrite32(pp->prd_dma + ATA_PRD_TBL_SZ * qc->hw_tag, 2164 ap->ioaddr.bmdma_addr + ATA_DMA_TABLE_OFS); 2165 2166 /* specify data direction, triple-check start bit is clear */ 2167 dmactl = ioread8(ap->ioaddr.bmdma_addr + ATA_DMA_CMD); 2168 dmactl &= ~ATA_DMA_WR; 2169 if (!rw) 2170 dmactl |= ATA_DMA_WR; 2171 2172 iowrite8(dmactl | ATA_DMA_START, ap->ioaddr.bmdma_addr + ATA_DMA_CMD); 2173} 2174 2175static void nv_swncq_host_interrupt(struct ata_port *ap, u16 fis) 2176{ 2177 struct nv_swncq_port_priv *pp = ap->private_data; 2178 struct ata_queued_cmd *qc; 2179 struct ata_eh_info *ehi = &ap->link.eh_info; 2180 u32 serror; 2181 u8 ata_stat; 2182 2183 ata_stat = ap->ops->sff_check_status(ap); 2184 nv_swncq_irq_clear(ap, fis); 2185 if (!fis) 2186 return; 2187 2188 if (ata_port_is_frozen(ap)) 2189 return; 2190 2191 if (fis & NV_SWNCQ_IRQ_HOTPLUG) { 2192 nv_swncq_hotplug(ap, fis); 2193 return; 2194 } 2195 2196 if (!pp->qc_active) 2197 return; 2198 2199 if (ap->ops->scr_read(&ap->link, SCR_ERROR, &serror)) 2200 return; 2201 ap->ops->scr_write(&ap->link, SCR_ERROR, serror); 2202 2203 if (ata_stat & ATA_ERR) { 2204 ata_ehi_clear_desc(ehi); 2205 ata_ehi_push_desc(ehi, "Ata error. fis:0x%X", fis); 2206 ehi->err_mask |= AC_ERR_DEV; 2207 ehi->serror |= serror; 2208 ehi->action |= ATA_EH_RESET; 2209 ata_port_freeze(ap); 2210 return; 2211 } 2212 2213 if (fis & NV_SWNCQ_IRQ_BACKOUT) { 2214 /* If the IRQ is backout, driver must issue 2215 * the new command again some time later. 2216 */ 2217 pp->ncq_flags |= ncq_saw_backout; 2218 } 2219 2220 if (fis & NV_SWNCQ_IRQ_SDBFIS) { 2221 pp->ncq_flags |= ncq_saw_sdb; 2222 ata_port_dbg(ap, "SWNCQ: qc_active 0x%X " 2223 "dhfis 0x%X dmafis 0x%X sactive 0x%X\n", 2224 pp->qc_active, pp->dhfis_bits, 2225 pp->dmafis_bits, readl(pp->sactive_block)); 2226 if (nv_swncq_sdbfis(ap) < 0) 2227 goto irq_error; 2228 } 2229 2230 if (fis & NV_SWNCQ_IRQ_DHREGFIS) { 2231 /* The interrupt indicates the new command 2232 * was transmitted correctly to the drive. 2233 */ 2234 pp->dhfis_bits |= (0x1 << pp->last_issue_tag); 2235 pp->ncq_flags |= ncq_saw_d2h; 2236 if (pp->ncq_flags & (ncq_saw_sdb | ncq_saw_backout)) { 2237 ata_ehi_push_desc(ehi, "illegal fis transaction"); 2238 ehi->err_mask |= AC_ERR_HSM; 2239 ehi->action |= ATA_EH_RESET; 2240 goto irq_error; 2241 } 2242 2243 if (!(fis & NV_SWNCQ_IRQ_DMASETUP) && 2244 !(pp->ncq_flags & ncq_saw_dmas)) { 2245 ata_stat = ap->ops->sff_check_status(ap); 2246 if (ata_stat & ATA_BUSY) 2247 goto irq_exit; 2248 2249 if (pp->defer_queue.defer_bits) { 2250 ata_port_dbg(ap, "send next command\n"); 2251 qc = nv_swncq_qc_from_dq(ap); 2252 nv_swncq_issue_atacmd(ap, qc); 2253 } 2254 } 2255 } 2256 2257 if (fis & NV_SWNCQ_IRQ_DMASETUP) { 2258 /* program the dma controller with appropriate PRD buffers 2259 * and start the DMA transfer for requested command. 2260 */ 2261 pp->dmafis_bits |= (0x1 << nv_swncq_tag(ap)); 2262 pp->ncq_flags |= ncq_saw_dmas; 2263 nv_swncq_dmafis(ap); 2264 } 2265 2266irq_exit: 2267 return; 2268irq_error: 2269 ata_ehi_push_desc(ehi, "fis:0x%x", fis); 2270 ata_port_freeze(ap); 2271 return; 2272} 2273 2274static irqreturn_t nv_swncq_interrupt(int irq, void *dev_instance) 2275{ 2276 struct ata_host *host = dev_instance; 2277 unsigned int i; 2278 unsigned int handled = 0; 2279 unsigned long flags; 2280 u32 irq_stat; 2281 2282 spin_lock_irqsave(&host->lock, flags); 2283 2284 irq_stat = readl(host->iomap[NV_MMIO_BAR] + NV_INT_STATUS_MCP55); 2285 2286 for (i = 0; i < host->n_ports; i++) { 2287 struct ata_port *ap = host->ports[i]; 2288 2289 if (ap->link.sactive) { 2290 nv_swncq_host_interrupt(ap, (u16)irq_stat); 2291 handled = 1; 2292 } else { 2293 if (irq_stat) /* reserve Hotplug */ 2294 nv_swncq_irq_clear(ap, 0xfff0); 2295 2296 handled += nv_host_intr(ap, (u8)irq_stat); 2297 } 2298 irq_stat >>= NV_INT_PORT_SHIFT_MCP55; 2299 } 2300 2301 spin_unlock_irqrestore(&host->lock, flags); 2302 2303 return IRQ_RETVAL(handled); 2304} 2305 2306static int nv_init_one(struct pci_dev *pdev, const struct pci_device_id *ent) 2307{ 2308 const struct ata_port_info *ppi[] = { NULL, NULL }; 2309 struct nv_pi_priv *ipriv; 2310 struct ata_host *host; 2311 struct nv_host_priv *hpriv; 2312 int rc; 2313 u32 bar; 2314 void __iomem *base; 2315 unsigned long type = ent->driver_data; 2316 2317 // Make sure this is a SATA controller by counting the number of bars 2318 // (NVIDIA SATA controllers will always have six bars). Otherwise, 2319 // it's an IDE controller and we ignore it. 2320 for (bar = 0; bar < PCI_STD_NUM_BARS; bar++) 2321 if (pci_resource_start(pdev, bar) == 0) 2322 return -ENODEV; 2323 2324 ata_print_version_once(&pdev->dev, DRV_VERSION); 2325 2326 rc = pcim_enable_device(pdev); 2327 if (rc) 2328 return rc; 2329 2330 /* determine type and allocate host */ 2331 if (type == CK804 && adma_enabled) { 2332 dev_notice(&pdev->dev, "Using ADMA mode\n"); 2333 type = ADMA; 2334 } else if (type == MCP5x && swncq_enabled) { 2335 dev_notice(&pdev->dev, "Using SWNCQ mode\n"); 2336 type = SWNCQ; 2337 } 2338 2339 ppi[0] = &nv_port_info[type]; 2340 ipriv = ppi[0]->private_data; 2341 rc = ata_pci_bmdma_prepare_host(pdev, ppi, &host); 2342 if (rc) 2343 return rc; 2344 2345 hpriv = devm_kzalloc(&pdev->dev, sizeof(*hpriv), GFP_KERNEL); 2346 if (!hpriv) 2347 return -ENOMEM; 2348 hpriv->type = type; 2349 host->private_data = hpriv; 2350 2351 /* request and iomap NV_MMIO_BAR */ 2352 rc = pcim_iomap_regions(pdev, 1 << NV_MMIO_BAR, DRV_NAME); 2353 if (rc) 2354 return rc; 2355 2356 /* configure SCR access */ 2357 base = host->iomap[NV_MMIO_BAR]; 2358 host->ports[0]->ioaddr.scr_addr = base + NV_PORT0_SCR_REG_OFFSET; 2359 host->ports[1]->ioaddr.scr_addr = base + NV_PORT1_SCR_REG_OFFSET; 2360 2361 /* enable SATA space for CK804 */ 2362 if (type >= CK804) { 2363 u8 regval; 2364 2365 pci_read_config_byte(pdev, NV_MCP_SATA_CFG_20, ®val); 2366 regval |= NV_MCP_SATA_CFG_20_SATA_SPACE_EN; 2367 pci_write_config_byte(pdev, NV_MCP_SATA_CFG_20, regval); 2368 } 2369 2370 /* init ADMA */ 2371 if (type == ADMA) { 2372 rc = nv_adma_host_init(host); 2373 if (rc) 2374 return rc; 2375 } else if (type == SWNCQ) 2376 nv_swncq_host_init(host); 2377 2378 if (msi_enabled) { 2379 dev_notice(&pdev->dev, "Using MSI\n"); 2380 pci_enable_msi(pdev); 2381 } 2382 2383 pci_set_master(pdev); 2384 return ata_pci_sff_activate_host(host, ipriv->irq_handler, ipriv->sht); 2385} 2386 2387#ifdef CONFIG_PM_SLEEP 2388static int nv_pci_device_resume(struct pci_dev *pdev) 2389{ 2390 struct ata_host *host = pci_get_drvdata(pdev); 2391 struct nv_host_priv *hpriv = host->private_data; 2392 int rc; 2393 2394 rc = ata_pci_device_do_resume(pdev); 2395 if (rc) 2396 return rc; 2397 2398 if (pdev->dev.power.power_state.event == PM_EVENT_SUSPEND) { 2399 if (hpriv->type >= CK804) { 2400 u8 regval; 2401 2402 pci_read_config_byte(pdev, NV_MCP_SATA_CFG_20, ®val); 2403 regval |= NV_MCP_SATA_CFG_20_SATA_SPACE_EN; 2404 pci_write_config_byte(pdev, NV_MCP_SATA_CFG_20, regval); 2405 } 2406 if (hpriv->type == ADMA) { 2407 u32 tmp32; 2408 struct nv_adma_port_priv *pp; 2409 /* enable/disable ADMA on the ports appropriately */ 2410 pci_read_config_dword(pdev, NV_MCP_SATA_CFG_20, &tmp32); 2411 2412 pp = host->ports[0]->private_data; 2413 if (pp->flags & NV_ADMA_ATAPI_SETUP_COMPLETE) 2414 tmp32 &= ~(NV_MCP_SATA_CFG_20_PORT0_EN | 2415 NV_MCP_SATA_CFG_20_PORT0_PWB_EN); 2416 else 2417 tmp32 |= (NV_MCP_SATA_CFG_20_PORT0_EN | 2418 NV_MCP_SATA_CFG_20_PORT0_PWB_EN); 2419 pp = host->ports[1]->private_data; 2420 if (pp->flags & NV_ADMA_ATAPI_SETUP_COMPLETE) 2421 tmp32 &= ~(NV_MCP_SATA_CFG_20_PORT1_EN | 2422 NV_MCP_SATA_CFG_20_PORT1_PWB_EN); 2423 else 2424 tmp32 |= (NV_MCP_SATA_CFG_20_PORT1_EN | 2425 NV_MCP_SATA_CFG_20_PORT1_PWB_EN); 2426 2427 pci_write_config_dword(pdev, NV_MCP_SATA_CFG_20, tmp32); 2428 } 2429 } 2430 2431 ata_host_resume(host); 2432 2433 return 0; 2434} 2435#endif 2436 2437static void nv_ck804_host_stop(struct ata_host *host) 2438{ 2439 struct pci_dev *pdev = to_pci_dev(host->dev); 2440 u8 regval; 2441 2442 /* disable SATA space for CK804 */ 2443 pci_read_config_byte(pdev, NV_MCP_SATA_CFG_20, ®val); 2444 regval &= ~NV_MCP_SATA_CFG_20_SATA_SPACE_EN; 2445 pci_write_config_byte(pdev, NV_MCP_SATA_CFG_20, regval); 2446} 2447 2448static void nv_adma_host_stop(struct ata_host *host) 2449{ 2450 struct pci_dev *pdev = to_pci_dev(host->dev); 2451 u32 tmp32; 2452 2453 /* disable ADMA on the ports */ 2454 pci_read_config_dword(pdev, NV_MCP_SATA_CFG_20, &tmp32); 2455 tmp32 &= ~(NV_MCP_SATA_CFG_20_PORT0_EN | 2456 NV_MCP_SATA_CFG_20_PORT0_PWB_EN | 2457 NV_MCP_SATA_CFG_20_PORT1_EN | 2458 NV_MCP_SATA_CFG_20_PORT1_PWB_EN); 2459 2460 pci_write_config_dword(pdev, NV_MCP_SATA_CFG_20, tmp32); 2461 2462 nv_ck804_host_stop(host); 2463} 2464 2465module_pci_driver(nv_pci_driver); 2466 2467module_param_named(adma, adma_enabled, bool, 0444); 2468MODULE_PARM_DESC(adma, "Enable use of ADMA (Default: false)"); 2469module_param_named(swncq, swncq_enabled, bool, 0444); 2470MODULE_PARM_DESC(swncq, "Enable use of SWNCQ (Default: true)"); 2471module_param_named(msi, msi_enabled, bool, 0444); 2472MODULE_PARM_DESC(msi, "Enable use of MSI (Default: false)"); 2473